Question

Упростить выражение 3(m-1)²+(m-2)(m²-2m+4)-(m+1)³

Answer 1

$3(m-1)^2+(m-2)(m^2-2m+4)-(m+1)^3=3(m^2-2m+1)+$
$+m^3-2m^2+4m-2m^2+4m-2m^2+4m-8-(m^3+3m^2+3m+$
$+1)=3m^2-6m+3+m^3-2m^2+4m-8-m^3-3m^2-3m-1=$
$=-m-6-4m ^{2}$