Question

Vă rog, e urgent!!!
Ex. 8

Answer 1

Explicație pas cu pas:

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

(x+2)(2x+4)=2(x+2)(x+2)=2(x+2)²

a(a+b)-(2a+1)(a+b)=(a+b)(a-2a-1)=

(a+b)(-a-1)=-(a+b)(a+1)

x(3x²+2)+2x(2+3x²)=x(3x²+2)+2x(3x²+2)=

x(3x²+2)(1+2)=3x(3x²+2)

(2x-3)²-5x(2x-3)=(2x-3)(2x-3-5x)=

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