Question

(r² -s²)(2r-5 rs + s) efectúa​

Answer 1

Respuesta:

$\left(r^2-s^2\right)\left(2r-5rs+s\right) =\\r^2\cdot \:2r+r^2\left(-5rs\right)+r^2s+\left(-s^2\right)\cdot \:2r+\left(-s^2\right)\left(-5rs\right)+\left(-s^2\right)s=\\2r^2r-5r^2rs+r^2s-2rs^2+5rs^2s-s^2s=\\2r^3-5r^3s+r^2s-2rs^2+5rs^3-s^3$