Question

Вставити пропущений елемент.
... х²+50хy+y²=(5x+y)²
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Answer 1

(5x+y)^2=25x^2+10xy+y^2

Объяснение:

(5x+y)^2=25x^2+10xy+y^2

Answer 2

Ответ:

${}\ \ \ ...x^2+50xy+y^2=(5x+y)^2\\\\(5x+y)^2=25x^2+10xy+y^2\\\\\underline {\underline{25}}x^2+50xy+y^2=(5x+y)^2+40xy$