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受欢迎的代数 >

16x^3-9^2=9

解答

16 x^{3} - 9^{2} = 9

解答

x = \frac{3 45}{2}, x = \frac{3 45 ( - \frac{1}{2} + \frac{3}{2} i )}{2}, x = \frac{3 45 ( - \frac{1}{2} - \frac{3}{2} i )}{2}

求解步骤

16 x^{3} - 9^{2} = 9

将

9^{2}

到右边

16 x^{3} = 90

两边除以

16

x^{3} = \frac{45}{8}

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}

x = 3 \frac{45}{8}, x = 3 \frac{45}{8} \frac{- 1 + 3 i}{2}, x = 3 \frac{45}{8} \frac{- 1 - 3 i}{2}

3 \frac{45}{8} = \frac{3 45}{2}

化简

3 \frac{45}{8} \frac{- 1 + 3 i}{2} : \frac{3 45 ( - \frac{1}{2} + \frac{3}{2} i )}{2}

化简

3 \frac{45}{8} \frac{- 1 - 3 i}{2} : \frac{3 45 ( - \frac{1}{2} - \frac{3}{2} i )}{2}

x = \frac{3 45}{2}, x = \frac{3 45 ( - \frac{1}{2} + \frac{3}{2} i )}{2}, x = \frac{3 45 ( - \frac{1}{2} - \frac{3}{2} i )}{2}

作图

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