Question

Сократите дробь:(х-3у)^2/х^2-9у^2

Answer 1

$\\\frac{(x-3y)^2}{x^2 - 9y^2} = \frac{(x-3y)(x-3y)}{(x-3y)(x+3y)} = \frac{x-3y}{x+3y}$