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受欢迎的代数 >

x^3+40=25

解答

x^{3} + 40 = 25

解答

x = - 315, x = - \frac{3 15 ( - 1 + 3 i )}{2}, x = - \frac{3 15 ( - 1 - 3 i )}{2}

求解步骤

x^{3} + 40 = 25

将

40

到右边

x^{3} = - 15

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 - 15, x = 3 - 15 \frac{- 1 + 3 i}{2}, x = 3 - 15 \frac{- 1 - 3 i}{2}

3 - 15 = - 315

化简

3 - 15 \frac{- 1 + 3 i}{2} : - \frac{3 15 ( - 1 + 3 i )}{2}

化简

3 - 15 \frac{- 1 - 3 i}{2} : - \frac{3 15 ( - 1 - 3 i )}{2}

x = - 315, x = - \frac{3 15 ( - 1 + 3 i )}{2}, x = - \frac{3 15 ( - 1 - 3 i )}{2}

作图

流行的例子

x^{3} = 6 x + 9

m^3+2m^2+4m+8=0

m^{3} + 2 m^{2} + 4 m + 8 = 0

因式分解 x^3-2x^2-5x+6=0

f a c t or x^{3} - 2 x^{2} - 5 x + 6 = 0

因式分解 p^4+40=14p^2

f a c t or p^{4} + 40 = 14 p^{2}

根 m^4+m^3+m^2=0

roo t s m^{4} + m^{3} + m^{2} = 0