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受欢迎的代数 >

u^3-13.2=-11.8

解答

u^{3} - 13.2 = - 11.8

解答

u = 3 \frac{7}{5}, u = \frac{3 7 ( - 1 + 3 i )}{2 3 5}, u = \frac{3 7 ( - 1 - 3 i )}{2 3 5}

求解步骤

u^{3} - 13.2 = - 11.8

将

13.2

到右边

u^{3} = 1.4

对于

x^{3} = f (a)

解为

x = 3 f (a), 3 f (a) \frac{- 1 - 3 i}{2}, 3 f (a) \frac{- 1 + 3 i}{2}

u = 3 1.4, u = 3 1.4 \frac{- 1 + 3 i}{2}, u = 3 1.4 \frac{- 1 - 3 i}{2}

3 1.4 = 3 \frac{7}{5}

化简

3 1.4 \frac{- 1 + 3 i}{2} : \frac{3 7 ( - 1 + 3 i )}{2 3 5}

化简

3 1.4 \frac{- 1 - 3 i}{2} : \frac{3 7 ( - 1 - 3 i )}{2 3 5}

u = 3 \frac{7}{5}, u = \frac{3 7 ( - 1 + 3 i )}{2 3 5}, u = \frac{3 7 ( - 1 - 3 i )}{2 3 5}

作图

流行的例子

x^{3} - 2^{3} = 0

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8 x^{3} - 46 x^{2} + 31 x - 5 = 0

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