Question

descompunerii in factori x la a 2 -4x-12
3x la a 2 +x -2

Answer 1

x^2-4x-12=
=x^2-6x+2x-12=
=x(x-6)+2(x-6)=
=(x-6)(x+2)

3x^2+x-2=
=x^2+x+2x^2-2=
=x(x-1)+2(x^2-1)=
=x(x-1)+2(x-1)(x+1)=
=(x-1)(x+1)(x+2)

sper că te-am ajutat ;)