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受欢迎的代数 >

-x^2-x+11=0

解答

- x^{2} - x + 11 = 0

解答

x = - \frac{1 + 3 5}{2}, x = \frac{3 5 - 1}{2}

+1

十进制

x = - 3.85410 \dots, x = 2.85410 \dots

求解步骤

- x^{2} - x + 11 = 0

使用求根公式求解

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

(- 1)^{2} - 4 (- 1) \cdot 11 = 35

x_{1, 2} = \frac{- ( - 1 ) \pm 3 5}{2 ( - 1 )}

将解分隔开

x_{1} = \frac{- ( - 1 ) + 3 5}{2 ( - 1 )}, x_{2} = \frac{- ( - 1 ) - 3 5}{2 ( - 1 )}

x = \frac{- ( - 1 ) + 3 5}{2 ( - 1 )} : - \frac{1 + 3 5}{2}

x = \frac{- ( - 1 ) - 3 5}{2 ( - 1 )} : \frac{3 5 - 1}{2}

二次方程组的解是:

x = - \frac{1 + 3 5}{2}, x = \frac{3 5 - 1}{2}

作图

流行的例子

化简 \sqrt[3]{-9}*\sqrt[3]{-81}

s im pl i f y 3 - 9 \cdot 3 - 81

10 x^{2} = 13 x - 4

5 x^{2} - x + 1 = 3

3(x-3)=11-5(3x+1)

3 (x - 3) = 11 - 5 (3 x + 1)

4 p^{2} = - 17 p - 4