Question

упростите : а) (3x+1)*(x-4)+(2x-7)*(x+2) б) (4а-2x)*(3a+x)-(6a-x)*(2a+2x)

Answer 1

А) 3x^2-12x+x-4+2x^2+4x-7x-14=-18+5x^2-14x

Answer 2

a) 3x^2-12x+x-4+2x^2+4x-7x-14=5x^2-18x-18
б) 12a^2+4ax-6ax-2x^2-12a^2+12ax-2ax-2x^2=
= 8ax-4x^2