Question

2o puncte rapid +coronita
rezolvati ecuatia (x+2)la2-(x-3)(x+3)+x

Answer 1

(x+2)²-(x-3)(x+3)+x=x2+2*x*2+2²-x²+3x-3x+0+x=5x+4

Answer 2

(x+2)^2-(x-3)(x+3)+x= (x^2+2*x*2+2^2)-(x^2-3^2)+x= (x^2+4x+4)-(x^2-9)+x= x^2+4x+4-x^2+9+x=5x+13 Cele 2 x-uri la a 2 a se reduc .