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受欢迎的代数 >

2m^2-3m-4=0

解答

2 m^{2} - 3 m - 4 = 0

解答

m = \frac{3 + 41}{4}, m = \frac{3 - 41}{4}

+1

十进制

m = 2.35078 \dots, m = - 0.85078 \dots

求解步骤

2 m^{2} - 3 m - 4 = 0

使用求根公式求解

m_{1, 2} = \frac{- ( - 3 ) \pm ( - 3 ) ^{2} - 4 \cdot 2 ( - 4 )}{2 \cdot 2}

(- 3)^{2} - 4 \cdot 2 (- 4) = 41

m_{1, 2} = \frac{- ( - 3 ) \pm 41}{2 \cdot 2}

将解分隔开

m_{1} = \frac{- ( - 3 ) + 41}{2 \cdot 2}, m_{2} = \frac{- ( - 3 ) - 41}{2 \cdot 2}

m = \frac{- ( - 3 ) + 41}{2 \cdot 2} : \frac{3 + 41}{4}

m = \frac{- ( - 3 ) - 41}{2 \cdot 2} : \frac{3 - 41}{4}

二次方程组的解是:

m = \frac{3 + 41}{4}, m = \frac{3 - 41}{4}

作图

流行的例子

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