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-4x^2-11x-6=0

解答

- 4 x^{2} - 11 x - 6 = 0

解答

x = - 2, x = - \frac{3}{4}

+1

十进制表示法

x = - 2, x = - 0.75

求解步骤

- 4 x^{2} - 11 x - 6 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 11 ) \pm ( - 11 ) ^{2} - 4 ( - 4 ) ( - 6 )}{2 ( - 4 )}

(- 11)^{2} - 4 (- 4) (- 6) = 5

x_{1, 2} = \frac{- ( - 11 ) \pm 5}{2 ( - 4 )}

将解分隔开

x_{1} = \frac{- ( - 11 ) + 5}{2 ( - 4 )}, x_{2} = \frac{- ( - 11 ) - 5}{2 ( - 4 )}

x = \frac{- ( - 11 ) + 5}{2 ( - 4 )} : - 2

x = \frac{- ( - 11 ) - 5}{2 ( - 4 )} : - \frac{3}{4}

二次方程组的解是:

x = - 2, x = - \frac{3}{4}

流行的例子

化简 1/5*6 化简

\frac{1}{5} \cdot 6

3 (x - 6)^{2} - 18 = 9

化简 1/(-1+2)化简

\frac{1}{- 1 + 2}

化简 2/3*8 化简

\frac{2}{3} \cdot 8

因式分解 4n^2+4n+4m^2+4m+2 因式分解

4 n^{2} + 4 n + 4 m^{2} + 4 m + 2