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受欢迎的代数 >

x^2-30x^2+125=0

解答

x^{2} - 30 x^{2} + 125 = 0

解答

x = \frac{5 5}{29}, x = - \frac{5 5}{29}

+1

十进制

x = 2.07613 \dots, x = - 2.07613 \dots

求解步骤

x^{2} - 30 x^{2} + 125 = 0

将

125

到右边

x^{2} - 30 x^{2} = - 125

同类项相加:

x^{2} - 30 x^{2} = - 29 x^{2}

- 29 x^{2} = - 125

两边除以

- 29

x^{2} = \frac{125}{29}

对于

x^{2} = f (a)

解为

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

x = \frac{125}{29}, x = - \frac{125}{29}

\frac{125}{29} = \frac{5 5}{29}

- \frac{125}{29} = - \frac{5 5}{29}

x = \frac{5 5}{29}, x = - \frac{5 5}{29}

作图

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199 = 0.1 w^{2} + 2.157 w + 20

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