展开 x^{2/5}(x-5)

解答

展开

x^{\frac{2}{5}} (x - 5)

x^{\frac{7}{5}} - x^{\frac{2}{5}} \cdot 5

求解步骤

x^{\frac{2}{5}} (x - 5)

使用分配律:

a (b - c) = ab - a c

x^{\frac{2}{5}} (x - 5) = x^{\frac{2}{5}} x - x^{\frac{2}{5}} \cdot 5

= x^{\frac{2}{5}} x - x^{\frac{2}{5}} \cdot 5

化简

x^{\frac{2}{5}} x : x^{\frac{7}{5}}

= x^{\frac{7}{5}} - x^{\frac{2}{5}} \cdot 5

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