Question

sabendo que x.y=10...​

Answer 1

$x.y=10$

$x^2+5y=30$

$x^3y+5xy^2-6xy=$

$xy.x^2+xy.5y-6xy=$

$xy(x^2+5y-6)=$

$10(30-6)=$

$10.24=$

$240$

Gabarito: c)