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


Răspuns :

[tex](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[/tex]