Question

Разложите на множители
a^3+a^2-x^2a-x^2

Answer 1

$a^3+a^2-x^2a-x^2=(a^3+a^2)-(x^2a+x^2)= \ =a^2(a+1)-x^2(a+1)=(a+1)(a^2-x^2)=(a+1)(a-x)(a+x)$