Operasi Pecahan Aljabar : 1. 4mn / 20m^2n - 16mn^2 2.4x^2 - 9y^2 / 2x^2 - 11xy - 12y^2 Tolong pakai cara ya kak ^_^

[tex]1. \: \frac{4mn}{20 {m}^{2}n - 16m {n}^{2} } = ... \\ \\ = \frac{4mn}{4mn(5m - 4n)} \\ \\ = \frac{1}{5m - 4n} [/tex]
[tex]2. \frac{4 {x}^{2} - 9 {y}^{2} }{2 {x}^{2} - 11xy + 12 {y}^{2} } = .... \\ \\ = \frac{(2x - 3y)(2x + 3y)}{(2x - 3y)(x - 4y)} \\ \\ = \frac{2x + 3y}{x - 4y} [/tex]