Solve (243+647)^2+(243-647)^2/243×243+647×647
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Answer:
(243+647)²+(243-647)²
————————————
(243)²+(647)²
= (900)²-(404)²
————————
(243)²+(647)²
= a²-b² = (a+b)(a-b)
= (900-404)(900+404)
————————————
59049 + 418609
= (496)(1304)
———————
477658
= (1)(1304)
--------------
963
= 1.354
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