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受欢迎的代数 >

7p^2-38p-24=0

解答

7 p^{2} - 38 p - 24 = 0

解答

p = 6, p = - \frac{4}{7}

+1

十进制

p = 6, p = - 0.57142 \dots

求解步骤

7 p^{2} - 38 p - 24 = 0

使用求根公式求解

p_{1, 2} = \frac{- ( - 38 ) \pm ( - 38 ) ^{2} - 4 \cdot 7 ( - 24 )}{2 \cdot 7}

(- 38)^{2} - 4 \cdot 7 (- 24) = 46

p_{1, 2} = \frac{- ( - 38 ) \pm 46}{2 \cdot 7}

将解分隔开

p_{1} = \frac{- ( - 38 ) + 46}{2 \cdot 7}, p_{2} = \frac{- ( - 38 ) - 46}{2 \cdot 7}

p = \frac{- ( - 38 ) + 46}{2 \cdot 7} : 6

p = \frac{- ( - 38 ) - 46}{2 \cdot 7} : - \frac{4}{7}

二次方程组的解是:

p = 6, p = - \frac{4}{7}

作图

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