Question

ПОМОГИТЕ!!!! ДАЮ 35 баллов

Answer 1

$1) 8x\cdot0,5x^3=(8\cdot0,5)x^{1+3}=4x^4.\\2) a)4a(x-6)=4ax-4a\cdot6=4ax-24a.\\g)2b(3b^2-2b-4)=2b\cdot3b^2-2b\cdot2b-2b\cdot4=6b^3-4b^2-8b.\\3) 3x(4x-1)-2x(4x+5)=3x\cdot4x-3x\cdot1-2x\cdot4x-2x\cdot5=12x^2-3x-8x^2-10x=4x^2-13x.\\4)3n(n-2)-4n(2n+3)+5n(n+2)=3n^2-6n-8n^2-12n+5n^2+10n=(3n^2-8n^2+5n^2)+(10n-12n-6n)=-8n=-8\cdot(-2,5)=20.$