展开 x^{1/2}(x-4)

解答

展开

x^{\frac{1}{2}} (x - 4)

x^{\frac{3}{2}} - x^{\frac{1}{2}} \cdot 4

求解步骤

x^{\frac{1}{2}} (x - 4)

使用分配律:

a (b - c) = ab - a c

x^{\frac{1}{2}} (x - 4) = x^{\frac{1}{2}} x - x^{\frac{1}{2}} \cdot 4

= x^{\frac{1}{2}} x - x^{\frac{1}{2}} \cdot 4

化简

x^{\frac{1}{2}} x : x^{\frac{3}{2}}

= x^{\frac{3}{2}} - x^{\frac{1}{2}} \cdot 4

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