Question

como simplificar x³-9x ???

Answer 1

Olá!

$\\ \mathsf{x^3 - 9x =} \\\\ \mathsf{x \cdot (x^2 - 9) =} \\\\ \mathsf{x \cdot (x^2 - 3^2) =} \\\\ \mathsf{x \cdot (x + 3) \cdot (x - 3)}$