Question

Dau puncte va rog ajutatima !!
a)2x•(-3+a)
b)0,2a•(5x+10y²)
c) (x-5)(3x²+x+1)+(x²-1)(-3x+16)

Answer 1

a)2x(-3+a)=2x·(-3)+2x·a=-6x+2xa
b)a·$\frac{1}{5}$·(5x+10y²)=$\frac{a}{5}$·5x+$\frac{a}{5}$·10y²=ax+2ay²
c)3·x³+x²+x-15x²-5x-5-3x³+16x²+3x-16=2x²-x-21