Question

(a²b²+5ab-3)×(4-ab) como resolver

Answer 1

$\large\boxed{\begin{array}{l}\sf(a^2b^2+5ab-3)(4-ab)\\\sf =4a^2b^2-a^2b^3+20ab-5a^2b^2-12+3ab\\\sf=-a^2b^2-a^2b^3+23ab\end{array}}$