Question

2x(x+5)-17=(x+2) totul la a doua+(x-3)(x+3)

Answer 1

2x (x+5)-17=(x+2)^2+(x-3)(x+3)=> 2x^2+10x-17=x^2+2*x*2+2^2+x^2-9=>2x^2+10x-17=x^2+4x+4+x^2-9=>2x^2+10x-x^2-4x-x^2=4-9+17=> 6x=12=> x=12:6=> x=2