Question

como simplificar as expressões 15x(2x+3)²

Answer 1

$15x(2x+3)^2\to\\\\ 15x(4x^2+12x+9)\to\\\\ \boxed{60x^3+180x^2+135x}$

Answer 2

15x(2x+3)²
15x(2x²+2.2x.3+3²)
15x(4x²+12x+9)
60x³+180x²+135x