Question

4°) efetue (x + 2)³ ? *

a) ( ) x² + 5x – 2y + 8
b) ( ) x³ + 6x² + 12x + 8
c) ( ) x³ + 6x² – 12x – 8
d) ( ) 2x³ – 6x² + 2x +8

ajuda pfvr?

Answer 1

Resposta:  B

Explicação passo a passo:

$(a+b)^{3} =a^{3} +3a^{2} b+3ab^{2} +b^{3}$

$(x+2)^{3} =x^{3} +3x^{2} .2+3.x.2^{2} +2^{3}$

$(x+2)^{3} =x^{3} +6x^{2} +12x+8$