Question

Productos Notables.
Ayuda por favor.

Answer 1

Respuesta:

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

${(x - y)}^{3} = {x}^{3} - 3 {x}^{2} y + 3x {y}^{2} - {y}^{3}$

${(x + y)}^{3} - {(x - y)}^{3} = 2 {y}^{3} + 6 {x}^{2} y$

$b = \frac{6 {x}^{2}y + 2 {y}^{3} }{ {y}^{2} + 3 {x}^{2} }$

$b = 2y$