Question

cubo de un binomio (5a + b)³solución​

Answer 1

Respuesta:

$125a^3+75a^2b+15ab^2+b^3$

Explicación:

(5a + b)³

Aplicar la formula de binomio al cubo :  $\left(a+b\right)^3=a^3+3a^2b+3ab^2+b^3$

$\left(5a+b\right)^3=\left(5a\right)^3+3\left(5a\right)^2b+3\cdot \:5ab^2+b^3$

$\left(5a\right)^3+3\left(5a\right)^2b+3\cdot \:5ab^2+b^3$

$125a^3+75a^2b+15ab^2+b^3$