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受欢迎的代数 >

36=12x-x^2

解答

36 = 12 x - x^{2}

解答

x = 6

求解步骤

36 = 12 x - x^{2}

交换两边

12 x - x^{2} = 36

将

36

para o lado esquerdo

12 x - x^{2} - 36 = 0

改写成标准形式

a x^{2} + b x + c = 0

- x^{2} + 12 x - 36 = 0

使用求根公式求解

x_{1, 2} = \frac{- 12 \pm 1 2 ^{2} - 4 ( - 1 ) ( - 36 )}{2 ( - 1 )}

1 2^{2} - 4 (- 1) (- 36) = 0

x_{1, 2} = \frac{- 12 \pm 0}{2 ( - 1 )}

x = \frac{- 12}{2 ( - 1 )}

\frac{- 12}{2 ( - 1 )} = 6

x = 6

二次方程组的解是:

x = 6

作图

流行的例子

2 x^{2} + 3 x - 54 = 0

- 16 x^{2} - 8 x + 64 = 0

x^2+22x+116.5=0

x^{2} + 22 x + 116.5 = 0

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x^2+18x+27=8x+3

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