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受欢迎的代数 >

4y^2-(4-y^2)=4

解答

4 y^{2} - (4 - y^{2}) = 4

解答

y = \frac{2 2}{5}, y = - \frac{2 2}{5}

+1

十进制

y = 1.26491 \dots, y = - 1.26491 \dots

求解步骤

4 y^{2} - (4 - y^{2}) = 4

展开

4 y^{2} - (4 - y^{2}) : 5 y^{2} - 4

5 y^{2} - 4 = 4

将

4

到右边

5 y^{2} = 8

两边除以

5

y^{2} = \frac{8}{5}

对于

x^{2} = f (a)

解为

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

y = \frac{8}{5}, y = - \frac{8}{5}

\frac{8}{5} = \frac{2 2}{5}

- \frac{8}{5} = - \frac{2 2}{5}

y = \frac{2 2}{5}, y = - \frac{2 2}{5}

作图

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