化简 (7/(x-12)+6(100-x))(x-12)

解答

化简

(\frac{7}{x - 12} + 6 (100 - x)) (x - 12)

- 6 x^{2} + 672 x - 7193

求解步骤

(\frac{7}{x - 12} + 6 (100 - x)) (x - 12)

合并

\frac{7}{x - 12} + 6 (100 - x) : \frac{- 6 x ^{2} + 672 x - 7193}{x - 12}

= \frac{- 6 x ^{2} + 672 x - 7193}{x - 12} (x - 12)

交叉约去公约数:

x - 12

= - 6 x^{2} + 672 x - 7193

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