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受欢迎的代数 >

14=-4p^2+8p+14

解答

14 = - 4 p^{2} + 8 p + 14

解答

p = 0, p = 2

求解步骤

14 = - 4 p^{2} + 8 p + 14

交换两边

- 4 p^{2} + 8 p + 14 = 14

将

14

para o lado esquerdo

- 4 p^{2} + 8 p = 0

使用求根公式求解

p_{1, 2} = \frac{- 8 \pm 8 ^{2} - 4 ( - 4 ) \cdot 0}{2 ( - 4 )}

8^{2} - 4 (- 4) \cdot 0 = 8

p_{1, 2} = \frac{- 8 \pm 8}{2 ( - 4 )}

将解分隔开

p_{1} = \frac{- 8 + 8}{2 ( - 4 )}, p_{2} = \frac{- 8 - 8}{2 ( - 4 )}

p = \frac{- 8 + 8}{2 ( - 4 )} : 0

p = \frac{- 8 - 8}{2 ( - 4 )} : 2

二次方程组的解是:

p = 0, p = 2

作图

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