Find two positive integers and to make the three expressions squares

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Find two positive integers and to make the three expressions squares

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9^4 + 9^2 X 40^2 = 369^2

40^4 + 9^2 X 40^2 = 1640^2

9 + 40 = 7^2

21^4 + 21^2 X 28^2 = 735^2

28^4 + 21^2 X 28^2 = 980^2

21 + 28 = 7^2

36^4 + 36^2 X 160^2 = 5904^2

160^4 + 36^2 X 160^2 = 26240^2

36 + 160 = 14^2

81^4 + 81^2 X 360^2 = 29889^2

360^4 + 81^2 X 360^2 = 132840^2

81 + 360 = 21^2

84^4 + 84^2 X 112^2 = 11760^2

112^4 + 84^2 X 112^2 = 15680^2

84 + 112 = 14^2

85^4 + 85^2 X 204^2 = 18785^2

204^4 + 85^2 X 204^2 = 45084^2

85 + 204 = 17^2

133^4 + 133^2 X 156^2 = 27265^2

156^4 + 133^2 X 156^2 = 31980^2

133 + 156 = 17^2

144^4 + 144^2 X 640^2 = 94464^2

640^4 + 144^2 X 640^2 = 419840^2

144 + 640 = 28^2

184^4 + 184^2 X 345^2 = 71944^2

345^4 + 184^2 X 345^2 = 134895^2

184 + 345 = 23^2

189^4 + 189^2 X 252^2 = 59535^2

252^4 + 189^2 X 252^2 = 79380^2

189 + 252 = 21^2

189^4 + 189^2 X 340^2 = 73521^2

340^4 + 189^2 X 340^2 = 132260^2

189 + 340 = 23^2

217^4 + 217^2 X 744^2 = 168175^2

744^4 + 217^2 X 744^2 = 576600^2

217 + 744 = 31^2

225^4 + 225^2 X 1000^2 = 230625^2

1000^4 + 225^2 X 1000^2 = 1025000^2

225 + 1000 = 35^2

336^4 + 336^2 X 448^2 = 188160^2

448^4 + 336^2 X 448^2 = 250880^2

336 + 448 = 28^2

340^4 + 340^2 X 816^2 = 300560^2

816^4 + 340^2 X 816^2 = 721344^2

340 + 816 = 34^2

400^4 + 400^2 X 561^2 = 275600^2

561^4 + 400^2 X 561^2 = 386529^2

400 + 561 = 31^2

525^4 + 525^2 X 700^2 = 459375^2

700^4 + 525^2 X 700^2 = 612500^2

525 + 700 = 35^2

532^4 + 532^2 X 624^2 = 436240^2

624^4 + 532^2 X 624^2 = 511680^2

532 + 624 = 34^2

820^4 + 820^2 X 861^2 = 974980^2

861^4 + 820^2 X 861^2 = 1023729^2

820 + 861 = 41^2

Paul.