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受欢迎的代数 >

30x^2+40=0

解答

30 x^{2} + 40 = 0

解答

x = \frac{2}{3} i, x = - \frac{2}{3} i

求解步骤

30 x^{2} + 40 = 0

将

40

到右边

30 x^{2} = - 40

两边除以

30

x^{2} = - \frac{4}{3}

对于

x^{2} = f (a)

解为

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

x = - \frac{4}{3}, x = - - \frac{4}{3}

- \frac{4}{3} = \frac{2}{3} i

- - \frac{4}{3} = - \frac{2}{3} i

x = \frac{2}{3} i, x = - \frac{2}{3} i

作图

流行的例子

4 x^{2} + 4 x = 1

x^{2} + 3 x - 12 = - 2

3 (3 x - 3)^{2} = 3

根 16u^2+25b^4+40ab^2

roo t s 16 u^{2} + 25 b^{4} + 40 a b^{2}

6 x^{2} + 4 x - 18 = 0