Question

Descompuneti in produs de factori:
a. x^3 -4x
b. x^3 +4x^2 +4x

Answer 1

a)x(x^2-4)=x(x+2)(x-2)
b)x(x^2+4x+4)=x(x+2)^2

Answer 2

$a. ~~ x^3-4x=x(x^2-4) =x(x-2)(x+2)\\b.~~x^3+4x^2+4x=x(x^2+4x+4)=x(x+2)^2$