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a fost răspuns

(×+3)la patrat+2×(×+3)(×-1)+(×-1)la patrat

Răspuns :

Ninaninett
(x+3)^+2(x+3)(x-1)+(x-1)^
=x^+6x+9+2(x^-x+3x-3)
+x^-2x+1
=x^+6x+9+2x^-2x+6x-6
+x^-2x+1
=4x^+2x+4
=2(2x^+x+2)

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