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受欢迎的 Geometry >

solvefor x,1.2x-(1.2p(x)^2)/(4200)=0

解答

求解

x, 1.2 x - \frac{1.2 p ( x ) ^{2}}{4200} = 0

解答

x = 0, x = \frac{4200}{p}; p \neq = 0

求解步骤

1.2 x - \frac{1.2 p x ^{2}}{4200} = 0

在两边乘以

10

12 x - \frac{x ^{2} p}{350} = 0

在两边乘以

350

- p x^{2} + 4200 x = 0

使用求根公式求解

x_{1, 2} = \frac{- 4200 \pm 420 0 ^{2} - 4 ( - p ) \cdot 0}{2 ( - p )}

420 0^{2} - 4 (- p) \cdot 0 = 4200

x_{1, 2} = \frac{- 4200 \pm 4200}{2 ( - p )}; p \neq = 0

将解分隔开

x_{1} = \frac{- 4200 + 4200}{2 ( - p )}, x_{2} = \frac{- 4200 - 4200}{2 ( - p )}

x = \frac{- 4200 + 4200}{2 ( - p )} : 0

x = \frac{- 4200 - 4200}{2 ( - p )} : \frac{4200}{p}

二次方程组的解是:

x = 0, x = \frac{4200}{p}; p \neq = 0

作图

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