Question

a²b-ab² sendo: a= -3sobre 2 e b 2sobre3

Answer 1

Se entendi o enunciado...

$a^2b-ab^2=\\\\ab(a-b)=\\\\\frac{-3}{2}\cdot\frac{2}{3}(\frac{-3}{2}-\frac{2}{3})=\\\\\frac{-6}{6}(\frac{-3\cdot3-2\cdot2}{2\cdot3})=\\\\-1(\frac{-9-4}{6})=\\\\\boxed{\frac{13}{6}}$