Question

(x+2y) (x^2-2xy+4y^2)

Answer 1

(x + 2y) (x²-2xy + 4y²)

(x + 2y) (x²- (x) (2y) + (2y) ²)

Sabemos que (a + b) (a² + b²-ab) = a³ + b³

x³ + (2y) ³

x³ + 8y³