Автор - Барон228

1) a(a-c+1)
2) 5x(x+y^2-5)
3) -xy(3y^2-5)
4)-2^2xy(4x-3y+5xy

Ответ

Автор - TortillaIzSurguta

a(a-c+1) = a*a-ac+a =a^2-ac+a

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

-xy(3y^2-5)=-3xy^3+5xy

-2^2xy(4x-3y+5xy)=-36x^2y+12xy^2

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