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受欢迎的代数 >

81x^2-5=0

解答

81 x^{2} - 5 = 0

解答

x = \frac{5}{9}, x = - \frac{5}{9}

+1

十进制

x = 0.2484519975, x = - 0.2484519975

求解步骤

81 x^{2} - 5 = 0

将

5

到右边

81 x^{2} = 5

两边除以

81

x^{2} = \frac{5}{81}

对于

x^{2} = f (a)

解为

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

x = \frac{5}{81}, x = - \frac{5}{81}

\frac{5}{81} = \frac{5}{9}

- \frac{5}{81} = - \frac{5}{9}

x = \frac{5}{9}, x = - \frac{5}{9}

作图

流行的例子

1 0^{2} = 6^{2} + b^{2}

- 4 t^{2} - 28 t + 3 = 0

- 10 = r^{2} - 10 r + 12

x^{2} + 8 x = - 6

-(q^2)/9+3q-2=0

- \frac{q ^{2}}{9} + 3 q - 2 = 0