Question

Fatore: 
 
a) x³-x²-xy
b)a+b+(a+b)x
c)4x²-12x+9

Answer 1

a) x³-x²-xy = x(x² -x -y)

b)a+b+(a+b)x ==> 1(a+b) +x(a+b) ==> (1+x)(a + b)

c)4x²-12x+9 ==> ( 2x - 3)²

Answer 2

a) x(x²-x-y)

b) a+b+ax+ bx 
    a + ax + b + bx
    a(1+x) + b(1+x)

c)4x(x-3) + 9 ou 4x - 3(4x - 3)