Question

(x+1)+(x+5)ori(x-2)
(x+1) este la puterea a2

Answer 1

$(x+1)^2+(x+5)(x-2) =x^2+2 \cdot x \cdot 1+1^2+x^2-2x+5x-10 =\\ =x^2+2x+1+x^2-2x+5x-10=2x^2+5x-9$