Question

*URGENTE* 5. Sendo A = x +5, B = x² + 2x + 1 e C = 2x² - 4, determine:
a) A . B
b) B . C
c) A . B . C

Answer 1

Resposta:

A) A*B

(X+5)*(X ^{2} +2X+1X2+2X+1 ) 

x ^{3} +2X ^{2} +X+5X ^{2} +10X+5x3+2X2+X+5X2+10X+5

            

 X ^{3} +7X ^{2} +11X+5X3+7X2+11X+5 .

B) B*C

(X ^{2} +2X+1) * (2X ^{2} -4)(X2+2X+1)∗(2X2−4)

2X^{4} -4X^{2} +4X ^{3} -8X+2X ^{2} -42X4−4X2+4X3−8X+2X2−4

       

  2X ^{4} +4X ^{3} -2X ^{2} -8X-42X4+4X3−2X2−8X−4 .

C)A*B*C

Pegue o resultado do A* B e multiplica pelo C :

(X^{3} +7X ^{2} +11X+5)*(2X ^{2} -4)(X3+7X2+11X+5)∗(2X2−4)

2X^{5} -4X ^{3} +14X ^{4} -28X^{2} +22X^{3} -44X+10X^{2} -202X5−4X3+14X4−28X2+22X3−44X+10X2−20

                   

                   2X^{5} +14X^{4} +18X^{3} -18X ^{2} -44X -20.2X5+14X4+18X3−18X2−44X−20. .

Explicação passo-a-passo:

tmj