展开 x-2(x^{1/3}+2^{1/3})

解答

展开

x - 2 (x^{\frac{1}{3}} + 2^{\frac{1}{3}})

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

求解步骤

x - 2 (x^{\frac{1}{3}} + 2^{\frac{1}{3}})

使用分配律:

a (b + c) = ab + a c

- 2 (x^{\frac{1}{3}} + 2^{\frac{1}{3}}) = - 2 x^{\frac{1}{3}} - 2 \cdot 2^{\frac{1}{3}}

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

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