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受欢迎的代数 >

-4.19x^2+2=0

解答

- 4.19 x^{2} + 2 = 0

解答

x = \frac{10 2}{419}, x = - \frac{10 2}{419}

+1

十进制

x = 0.69088 \dots, x = - 0.69088 \dots

求解步骤

- 4.19 x^{2} + 2 = 0

将

2

到右边

- 4.19 x^{2} = - 2

在两边乘以

100

- 419 x^{2} = - 200

两边除以

- 419

x^{2} = \frac{200}{419}

对于

x^{2} = f (a)

解为

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

x = \frac{200}{419}, x = - \frac{200}{419}

\frac{200}{419} = \frac{10 2}{419}

- \frac{200}{419} = - \frac{10 2}{419}

x = \frac{10 2}{419}, x = - \frac{10 2}{419}

作图

流行的例子

2.93^2=19.82^2+(24x)^2+((10)/pi x)^2

2.9 3^{2} = 19.8 2^{2} + (24 x)^{2} + (\frac{10}{π} x)^{2}

4=x^1*4.55+x^2*3.72

4 = x^{1} \cdot 4.55 + x^{2} \cdot 3.72

- 2 - 5 c^{2} = - 92

c^{2} = - 10 c

x^{2} = 1 - 2 x