Question

ПОМОГИТЕ!!!! ДАЮ 35 баллов

Answer 1

$1) 8xcdot0,5x^3=(8cdot0,5)x^{1+3}=4x^4.\2) a)4a(x-6)=4ax-4acdot6=4ax-24a.\g)2b(3b^2-2b-4)=2bcdot3b^2-2bcdot2b-2bcdot4=6b^3-4b^2-8b.\3) 3x(4x-1)-2x(4x+5)=3xcdot4x-3xcdot1-2xcdot4x-2xcdot5=12x^2-3x-8x^2-10x=4x^2-13x.\4)3n(n-2)-4n(2n+3)+5n(n+2)=3n^2-6n-8n^2-12n+5n^2+10n=(3n^2-8n^2+5n^2)+(10n-12n-6n)=-8n=-8cdot(-2,5)=20.$