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受欢迎的代数 >

18+(70-5x^2)=5.6x^2

解答

18 + (70 - 5 x^{2}) = 5.6 x^{2}

解答

x = \frac{2 110}{53}, x = - \frac{2 110}{53}

+1

十进制

x = 2.88129 \dots, x = - 2.88129 \dots

求解步骤

18 + (70 - 5 x^{2}) = 5.6 x^{2}

整理后得

- 5 x^{2} + 88 = 5.6 x^{2}

将

88

到右边

- 5 x^{2} = 5.6 x^{2} - 88

将

5.6 x^{2}

para o lado esquerdo

- 10.6 x^{2} = - 88

在两边乘以

10

- 106 x^{2} = - 880

两边除以

- 106

x^{2} = \frac{440}{53}

对于

x^{2} = f (a)

解为

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

x = \frac{440}{53}, x = - \frac{440}{53}

\frac{440}{53} = \frac{2 110}{53}

- \frac{440}{53} = - \frac{2 110}{53}

x = \frac{2 110}{53}, x = - \frac{2 110}{53}

作图

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