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受欢迎的代数 >

-3x^2+54x=51

解答

- 3 x^{2} + 54 x = 51

解答

x = 1, x = 17

求解步骤

- 3 x^{2} + 54 x = 51

将

51

para o lado esquerdo

- 3 x^{2} + 54 x - 51 = 0

使用求根公式求解

x_{1, 2} = \frac{- 54 \pm 5 4 ^{2} - 4 ( - 3 ) ( - 51 )}{2 ( - 3 )}

5 4^{2} - 4 (- 3) (- 51) = 48

x_{1, 2} = \frac{- 54 \pm 48}{2 ( - 3 )}

将解分隔开

x_{1} = \frac{- 54 + 48}{2 ( - 3 )}, x_{2} = \frac{- 54 - 48}{2 ( - 3 )}

x = \frac{- 54 + 48}{2 ( - 3 )} : 1

x = \frac{- 54 - 48}{2 ( - 3 )} : 17

二次方程组的解是:

x = 1, x = 17

作图

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