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受欢迎的代数 >

2x^2-1 7/25 =0

解答

2 x^{2} - 1 \frac{7}{25} = 0

解答

x = \frac{4}{5}, x = - \frac{4}{5}

+1

十进制

x = 0.8, x = - 0.8

求解步骤

2 x^{2} - 1 \frac{7}{25} = 0

将带分数转换为假分式:

1 \frac{7}{25} = \frac{32}{25}

2 x^{2} - \frac{32}{25} = 0

将

\frac{32}{25}

到右边

2 x^{2} = \frac{32}{25}

两边除以

2

x^{2} = \frac{16}{25}

对于

x^{2} = f (a)

解为

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

x = \frac{16}{25}, x = - \frac{16}{25}

\frac{16}{25} = \frac{4}{5}

- \frac{16}{25} = - \frac{4}{5}

x = \frac{4}{5}, x = - \frac{4}{5}

作图

流行的例子

a x^{2} + 2 x + 1 = 0

roo t s 2 x^{2} + 3 x - 1

solvefor x,y=2x^2-12x-11

so l v e f or x, y = 2 x^{2} - 12 x - 11

x^{2} - 4 x + 8 = 3

x^{2} + 2 = 4 x - 1