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x-3 - y-1 per 2x-1 + y-2
jika bentuknya seperti ini
(x^-3 – y^-1)/(2x^-1 + y^-2)
= ((1/x³) – (1/y)) / ((2/x) + (1/y²))
dg cara menyamakan penyebut
= ((y/yx³) – (x³/yx³) / ((2y²/xy²) + (x/xy²))
= ((y-x³)/yx³) / ((2y²+x)/xy²)
= (xy²(y-x³)) / yx³(2y²+x)
= y(y-x³) / x²(2y²+x)