Question

Преобразуйте произведение в многочлен! Срочно!

1) xy(8 - x) = ...

2) -2m^3n^5(6m^3-m^2n^4+10n^2) = ...

3) 3/7(дробь)xy^2(7x-1,4y+35) = ...

Answer 1

1)    $xy(8 - x)=8xy-x^{2} y=-x^{2} y+8xy$

2)   $-2m^3n^5(6m^3-m^2n^4+10n^2) =-12m^6n^5+2m^5n^9-20m^3n^7$

3)  $\frac{3}{7} xy^2(7x-1,4y+35) = 3x^{2} y^2-0,6xy^3+15xy^2$