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受欢迎的代数 >

-3x^2+8x=((-3)-(-3))/((4)-(0))

解答

- 3 x^{2} + 8 x = \frac{( - 3 ) - ( - 3 )}{( 4 ) - ( 0 )}

解答

x = 0, x = \frac{8}{3}

+1

十进制

x = 0, x = 2.66666 \dots

求解步骤

- 3 x^{2} + 8 x = \frac{( - 3 ) - ( - 3 )}{( 4 ) - ( 0 )}

化简

(4) - (0) : 4

- 3 x^{2} + 8 x = \frac{( - 3 ) - ( - 3 )}{4}

在两边乘以

4

- 12 x^{2} + 32 x = 0

使用求根公式求解

x_{1, 2} = \frac{- 32 \pm 3 2 ^{2} - 4 ( - 12 ) \cdot 0}{2 ( - 12 )}

3 2^{2} - 4 (- 12) \cdot 0 = 32

x_{1, 2} = \frac{- 32 \pm 32}{2 ( - 12 )}

将解分隔开

x_{1} = \frac{- 32 + 32}{2 ( - 12 )}, x_{2} = \frac{- 32 - 32}{2 ( - 12 )}

x = \frac{- 32 + 32}{2 ( - 12 )} : 0

x = \frac{- 32 - 32}{2 ( - 12 )} : \frac{8}{3}

二次方程组的解是:

x = 0, x = \frac{8}{3}

作图

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