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受欢迎的代数 >

4-x^2=4-3x

解答

4 - x^{2} = 4 - 3 x

解答

x = 0, x = 3

求解步骤

4 - x^{2} = 4 - 3 x

将

3 x

para o lado esquerdo

4 - x^{2} + 3 x = 4

将

4

para o lado esquerdo

- x^{2} + 3 x = 0

使用求根公式求解

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

3^{2} - 4 (- 1) \cdot 0 = 3

x_{1, 2} = \frac{- 3 \pm 3}{2 ( - 1 )}

将解分隔开

x_{1} = \frac{- 3 + 3}{2 ( - 1 )}, x_{2} = \frac{- 3 - 3}{2 ( - 1 )}

x = \frac{- 3 + 3}{2 ( - 1 )} : 0

x = \frac{- 3 - 3}{2 ( - 1 )} : 3

二次方程组的解是:

x = 0, x = 3

作图

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