Knowledge

Talk:Difference of two squares

Source 📝

84: 74: 53: 22: 601:
I'm not sure what's the best option to proceed here. One option might be to make (leave?) this a statement about real numbers of distance one and change the terminology accordingly. Another option might be to make make this statement about sequential integers or naturals (I suppose you intended that)
595:
I agree that current terminology is not helpful if it is understood as a statement about real numbers (and I couldn't find any book or paper using such terminology in a superficial search). The reason why I reverted this was that if restricted to natural numbers it somewhat redundant to the theorem
694:
Well allowing (positive) real numbers instead of natural numbers turns the whole thing into (trivial) geometric theorem (as stated above and the notion of bases makes sense as base side) rather than being just an geometric illustration of number theoretic theorem. Whether such a "geometric theorem"
607:
As far as "adjacent squares" in terms of real numbers are concerned, there is a way to make some sense of geometrically. That if the side length of 2 squares differ by one, then the difference in area in identical to the sum of their base sides (ignoring units). You can visualize that nicely by
662:
article. I'm not sure what the additional benefit is in allowing for real numbers here. The concept of "adjacent" squares loses its meaning and actually any real number can be expressed as a difference of squares in infinitely many
608:
placing the squares on top of each and we could actually include such drawing into the article. Maybe that's even what the original author had in mind, but that's pure speculation on my side now.--
649:
the sum of the square roots. I agree that the statement that an odd number can be expressed as a difference of (consecutive perfect) squares is redundant, so that sentence could simply be deleted.
140: 262:
The geometric illustration does not point out that the two rectangles represent (a-b)b. A better account of the picture would vastly help some people understand the whole article.
575:, but why would all this be worth mentioning? Describing two real numbers as adjacent is meaningless since they are uncountable and calling the square root "base" is misleading. 476: 569: 695:
is worthwhile to mention here is imho a matter of taste/editorial discretion, it certainly doesn't need to be in the article, but I see no harm in mentioning it either.--
520: 602:
and explain the terminology in that context (or modify it). In that case however we should merge that with theorem directly after to avoided having the same proof twice.
421: 296:
There is also a formula derivable from a difference of two squares to receive the difference's value. when a is a perfect square, x^2 - a = (x - a)^2 - a(a + 2x -1)
742:
Wiktionary doesn’t state anything about numbers other than real, Wiktionary isn’t any particular authority on algebra and, at the end, Wiktionary is no more than a
275:
A more explicit connection between the text and illustrations could help readers of wikipedia.(After all, mathematical prodigies don't need it in the first place)
194: 672:
My view is that it would be more interesting to discuss how the difference of consecutive perfect squares leads to a recursive formula for calculating the
775: 130: 770: 106: 282: 303: 383:
The statement about the difference of two consecutive perfect squares makes sense here, but why would statements about real numbers
97: 58: 368:
It actually makes sense to mention it both articles, here it is an example for another application of the difference of squares.--
33: 259:
Many students would find it helpful to be told more of the relationship between the equations and the illustration.
327: 220:
Could someone create a disambiguation page that also links DOTS here. I've seen DOTS as an abbreviation for this.
221: 720: 286: 224: 21: 307: 751: 349:
I think the contents of the section Difference of adjacent squares would make more sense in the article
323: 322:
This addition moved here for consideration. The identity is valid but didn't really fit well as placed.
207: 39: 83: 426: 299: 278: 676:
th perfect square from the previous one and mention the concept of squarity testing as described in
242: 228: 525: 105:
on Knowledge. If you would like to participate, please visit the project page, where you can join
728: 89: 226:. However, there's another page that has DOTS as a redirect. I was just unsure how to do this. 73: 52: 685: 580: 481: 358: 747: 700: 613: 373: 203: 394: 173: 755: 736: 704: 689: 617: 584: 377: 362: 331: 311: 290: 248: 234: 210: 764: 724: 677: 659: 630: 350: 681: 576: 354: 696: 609: 369: 102: 240:
Oh, I'm not sure if the sum of two squares should also be added to this page.
79: 629:
of this section was referring to was that the difference of two consecutive
658:
The geometrical interpretation that you propose is already included in the
199: 341:(x^2-y^2)= 2dx-d^2 (Where "d" is the difference between the numbers) 743: 15: 680:. In any case, there should also be a link to that article. 198:) format, because the latter fails to render properly. See 391:
with a certain distance between them be relevant? Yes, if
627: 528: 484: 429: 397: 176: 101:, a collaborative effort to improve the coverage of 719:Is this only for real numbers as inferred from the 571:
and of course any real number can be expressed as 4
563: 514: 470: 415: 188: 596:about odd numbers following directly afterwards. 8: 47: 19: 546: 533: 527: 483: 447: 434: 428: 396: 337:An alternative method, Momaney's Theorem: 175: 590:Sorry for my somewhat premature reverts. 269:ab-b^2 + (a^2 - 2ab + b^2) + ab - b^2 = 266:(a-b)b + (a-b)(a-b) + (a-b)b = 49: 170:" (''b'' − ''a'') format, instead of " 7: 626:I think what the "original" wording 95:This article is within the scope of 38:It is of interest to the following 14: 776:Low-priority mathematics articles 162:The math markup is currently in " 115:Knowledge:WikiProject Mathematics 471:{\displaystyle a^{2}-b^{2}=2b+1} 118:Template:WikiProject Mathematics 82: 72: 51: 20: 771:Stub-Class mathematics articles 135:This article has been rated as 564:{\displaystyle a^{2}-b^{2}=4x} 332:12:55, 23 September 2011 (UTC) 312:01:14, 22 September 2010 (UTC) 1: 705:22:06, 15 November 2013 (UTC) 690:11:47, 15 November 2013 (UTC) 618:00:35, 15 November 2013 (UTC) 585:19:04, 14 November 2013 (UTC) 378:12:52, 14 November 2013 (UTC) 363:11:14, 14 November 2013 (UTC) 211:23:04, 24 December 2006 (UTC) 109:and see a list of open tasks. 249:01:40, 6 December 2007 (UTC) 235:23:21, 5 December 2007 (UTC) 255:Clarifying the illustration 792: 291:06:55, 12 April 2008 (UTC) 515:{\displaystyle a+1=b-1=x} 134: 67: 46: 756:15:21, 2 July 2019 (UTC) 737:14:14, 2 July 2019 (UTC) 141:project's priority scale 98:WikiProject Mathematics 565: 516: 472: 417: 190: 28:This article is rated 566: 517: 473: 418: 416:{\displaystyle a=b+1} 191: 641:-1)th, is equal to 2 526: 482: 427: 395: 174: 121:mathematics articles 318:Moved from the page 189:{\displaystyle b-a} 561: 512: 468: 413: 247: 233: 186: 90:Mathematics portal 34:content assessment 302:comment added by 293: 281:comment added by 244:S♦s♦e♦b♦a♦l♦l♦o♦s 241: 230:S♦s♦e♦b♦a♦l♦l♦o♦s 227: 197:b-a</math: --> 155: 154: 151: 150: 147: 146: 783: 570: 568: 567: 562: 551: 550: 538: 537: 521: 519: 518: 513: 477: 475: 474: 469: 452: 451: 439: 438: 422: 420: 419: 414: 324:Charles Matthews 314: 276: 245: 231: 196:" (<math: --> 195: 193: 192: 187: 123: 122: 119: 116: 113: 92: 87: 86: 76: 69: 68: 63: 55: 48: 31: 25: 24: 16: 791: 790: 786: 785: 784: 782: 781: 780: 761: 760: 717: 542: 529: 524: 523: 480: 479: 443: 430: 425: 424: 393: 392: 347: 320: 297: 257: 243: 229: 218: 172: 171: 160: 120: 117: 114: 111: 110: 88: 81: 61: 32:on Knowledge's 29: 12: 11: 5: 789: 787: 779: 778: 773: 763: 762: 759: 758: 716: 713: 712: 711: 710: 709: 708: 707: 667: 666: 665: 664: 653: 652: 651: 650: 631:square numbers 621: 620: 604: 603: 598: 597: 592: 591: 560: 557: 554: 549: 545: 541: 536: 532: 511: 508: 505: 502: 499: 496: 493: 490: 487: 467: 464: 461: 458: 455: 450: 446: 442: 437: 433: 412: 409: 406: 403: 400: 381: 380: 346: 343: 339: 338: 319: 316: 283:198.53.140.155 265: 256: 253: 252: 251: 217: 216:DOTS disambig? 214: 185: 182: 179: 159: 156: 153: 152: 149: 148: 145: 144: 133: 127: 126: 124: 107:the discussion 94: 93: 77: 65: 64: 56: 44: 43: 37: 26: 13: 10: 9: 6: 4: 3: 2: 788: 777: 774: 772: 769: 768: 766: 757: 753: 749: 745: 741: 740: 739: 738: 734: 732: 726: 722: 714: 706: 702: 698: 693: 692: 691: 687: 683: 679: 678:square number 675: 671: 670: 669: 668: 661: 660:square number 657: 656: 655: 654: 648: 644: 640: 636: 632: 628: 625: 624: 623: 622: 619: 615: 611: 606: 605: 600: 599: 594: 593: 589: 588: 587: 586: 582: 578: 574: 558: 555: 552: 547: 543: 539: 534: 530: 509: 506: 503: 500: 497: 494: 491: 488: 485: 465: 462: 459: 456: 453: 448: 444: 440: 435: 431: 410: 407: 404: 401: 398: 390: 386: 379: 375: 371: 367: 366: 365: 364: 360: 356: 352: 351:square number 345:Section split 344: 342: 336: 335: 334: 333: 329: 325: 317: 315: 313: 309: 305: 301: 294: 292: 288: 284: 280: 273: 270: 267: 263: 260: 254: 250: 246: 239: 238: 237: 236: 232: 225: 222: 215: 213: 212: 209: 205: 201: 183: 180: 177: 169: 165: 157: 142: 138: 132: 129: 128: 125: 108: 104: 100: 99: 91: 85: 80: 78: 75: 71: 70: 66: 60: 57: 54: 50: 45: 41: 35: 27: 23: 18: 17: 730: 718: 673: 646: 642: 638: 634: 572: 388: 384: 382: 348: 340: 321: 304:24.44.52.119 295: 274: 272:(a^2 - b^2) 271: 268: 264: 261: 258: 219: 167: 163: 161: 137:Low-priority 136: 96: 62:Low‑priority 40:WikiProjects 748:Incnis Mrsi 746:. Risible. 298:—Preceding 277:—Preceding 112:Mathematics 103:mathematics 59:Mathematics 765:Categories 721:wiktionary 633:, say the 30:Stub-class 725:Sobreira 637:th and ( 300:unsigned 279:unsigned 200:bug 8373 682:Isheden 577:Isheden 478:and if 355:Isheden 204:grendel 139:on the 731:parlez 697:Kmhkmh 610:Kmhkmh 370:Kmhkmh 158:Markup 36:scale. 727:◣◥ ፧ 663:ways. 522:then 423:then 752:talk 744:wiki 723:. ※ 701:talk 686:talk 647:i.e. 645:-1, 614:talk 581:talk 387:and 374:talk 359:talk 328:talk 308:talk 287:talk 223:and 208:khan 735:⁇﹖ 131:Low 767:: 754:) 703:) 688:) 616:) 583:) 540:− 501:− 441:− 376:) 361:) 353:. 330:) 310:) 289:) 202:. 181:− 166:− 750:( 733:) 729:( 715:R 699:( 684:( 674:n 643:n 639:n 635:n 612:( 579:( 573:x 559:x 556:4 553:= 548:2 544:b 535:2 531:a 510:x 507:= 504:1 498:b 495:= 492:1 489:+ 486:a 466:1 463:+ 460:b 457:2 454:= 449:2 445:b 436:2 432:a 411:1 408:+ 405:b 402:= 399:a 389:b 385:a 372:( 357:( 326:( 306:( 285:( 206:| 184:a 178:b 168:a 164:b 143:. 42::

Index


content assessment
WikiProjects
WikiProject icon
Mathematics
WikiProject icon
icon
Mathematics portal
WikiProject Mathematics
mathematics
the discussion
Low
project's priority scale
bug 8373
grendel
khan
23:04, 24 December 2006 (UTC)


S♦s♦e♦b♦a♦l♦l♦o♦s
23:21, 5 December 2007 (UTC)
S♦s♦e♦b♦a♦l♦l♦o♦s
01:40, 6 December 2007 (UTC)
unsigned
198.53.140.155
talk
06:55, 12 April 2008 (UTC)
unsigned
24.44.52.119
talk

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.