Question

Por favor poderiam me responder

Answer 1

Resposta:

165

Explicação passo-a-passo:

$3a^{4} b^{4} - 15ab^{3} - 21a^{2}b^{3} / (3ab^{2})$

$3.5^4.(-1)^4 - 15.5.(-1)^3 - 21.5^2.(-1)^3/ 3.5.(-1)^2$

3.625.1 - 15.5.(-1) - 21.25.(-1)/ 3.5.1

1875 - (-75) - (-525)/ 15

1875+75+525/ 15

2475/ 15 = 165

Answer 2

Explicação passo-a-passo:

$\frac{3a^4b^4-15ab^3-21a^2b^3}{3ab^2} = \frac{3a^4b^4}{3ab^2}-\frac{15ab^3}{3ab^2}- \frac{21a^2b^3}{3ab^2} = a^3b^2-{5b-7ab$

para a = 5 e b = −1:

a³b² − 5b − 7ab = 5³ × (−1)² − 5 × (−1) − 7 × 5 × (−1) =

a³b² − 5b − 7ab = 125 + 5 + 35

a³b² − 5b − 7ab = 165