Question

Alguém sabe resolver?

(1/2x-3y)²

Answer 1

$(\frac{1}{2x} - 3y)^2\\\\\\\frac{1}{4x^2} - 2*\frac{1}{2x} *3y +9y^2\\\\\frac{1}{4x^2} - \frac{6y}{x} + 9y^2\\ \\9y^2 - \frac{6y}{x} + \frac{1}{4x^2}$