(x-y)=8
Возводим в квадрат
x²-2xy+y²=64⇒
x²+y²=64+2xy
x²+y²=64+2·3
x²+y²=70
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(x-y)=8
Возводим в квадрат
x²-2xy+y²=64⇒
x²+y²=64+2xy
x²+y²=64+2·3
x²+y²=70