Ответ:
Объяснение:
5(x+y)^2 - 10xy = 5(x^2 + 2xy + y^2) - 10xy =
= 5x^2 + 10xy + 5y^2 - 10xy = 5x^2 + 5y^2
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Ответ:
Объяснение:
5(x+y)^2 - 10xy = 5(x^2 + 2xy + y^2) - 10xy =
= 5x^2 + 10xy + 5y^2 - 10xy = 5x^2 + 5y^2