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受欢迎的代数 >

-2x^2+2=2.5

解答

- 2 x^{2} + 2 = 2.5

解答

x = \frac{1}{2} i, x = - \frac{1}{2} i

求解步骤

- 2 x^{2} + 2 = 2.5

将

2

到右边

- 2 x^{2} = 0.5

两边除以

- 2

x^{2} = - 0.25

对于

x^{2} = f (a)

解为

x = f (a), - f (a)

x = - 0.25, x = - - 0.25

- 0.25 = \frac{1}{2} i

- - 0.25 = - \frac{1}{2} i

x = \frac{1}{2} i, x = - \frac{1}{2} i

作图

流行的例子

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