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受欢迎的代数 >

(-1/3)^2+x^2=1

解答

(- \frac{1}{3})^{2} + x^{2} = 1

解答

x = \frac{2 2}{3}, x = - \frac{2 2}{3}

+1

十进制

x = 0.94280 \dots, x = - 0.94280 \dots

求解步骤

(- \frac{1}{3})^{2} + x^{2} = 1

展开

(- \frac{1}{3})^{2} + x^{2} : \frac{1}{9} + x^{2}

\frac{1}{9} + x^{2} = 1

将

\frac{1}{9}

到右边

x^{2} = 1 - \frac{1}{9}

化简

1 - \frac{1}{9} : \frac{8}{9}

对于

x^{2} = f (a)

解为

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

x = \frac{8}{9}, x = - \frac{8}{9}

\frac{8}{9} = \frac{2 2}{3}

- \frac{8}{9} = - \frac{2 2}{3}

x = \frac{2 2}{3}, x = - \frac{2 2}{3}

作图

流行的例子

(x - 4)^{2} - 40 = 0

2 - x = 2 - (x - 1)^{2}

(x - 4) (x - 1) = 28

d^{2} = 45

66 x^{2} - 55 x = 0