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受欢迎的代数 >

11y^2-12y+2=0

解答

11 y^{2} - 12 y + 2 = 0

解答

y = \frac{6 + 14}{11}, y = \frac{6 - 14}{11}

+1

十进制

y = 0.88560 \dots, y = 0.20530 \dots

求解步骤

11 y^{2} - 12 y + 2 = 0

使用求根公式求解

y_{1, 2} = \frac{- ( - 12 ) \pm ( - 12 ) ^{2} - 4 \cdot 11 \cdot 2}{2 \cdot 11}

(- 12)^{2} - 4 \cdot 11 \cdot 2 = 214

y_{1, 2} = \frac{- ( - 12 ) \pm 2 14}{2 \cdot 11}

将解分隔开

y_{1} = \frac{- ( - 12 ) + 2 14}{2 \cdot 11}, y_{2} = \frac{- ( - 12 ) - 2 14}{2 \cdot 11}

y = \frac{- ( - 12 ) + 2 14}{2 \cdot 11} : \frac{6 + 14}{11}

y = \frac{- ( - 12 ) - 2 14}{2 \cdot 11} : \frac{6 - 14}{11}

二次方程组的解是:

y = \frac{6 + 14}{11}, y = \frac{6 - 14}{11}

作图

流行的例子

- 2 x^{2} - 2 x + 40 = 0

x^{2} = 69

solvefor x,x^2y^9=2

so l v e f or x, x^{2} y^{9} = 2

3 x^{2} + 6 x - 4 = 2 x + 3

x (2 + 2 x) = 60