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受欢迎的代数 >

x^2+18x=6x-35

解答

x^{2} + 18 x = 6 x - 35

解答

x = - 5, x = - 7

求解步骤

x^{2} + 18 x = 6 x - 35

将

35

para o lado esquerdo

x^{2} + 18 x + 35 = 6 x

将

6 x

para o lado esquerdo

x^{2} + 12 x + 35 = 0

使用求根公式求解

x_{1, 2} = \frac{- 12 \pm 1 2 ^{2} - 4 \cdot 1 \cdot 35}{2 \cdot 1}

1 2^{2} - 4 \cdot 1 \cdot 35 = 2

x_{1, 2} = \frac{- 12 \pm 2}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 12 + 2}{2 \cdot 1}, x_{2} = \frac{- 12 - 2}{2 \cdot 1}

x = \frac{- 12 + 2}{2 \cdot 1} : - 5

x = \frac{- 12 - 2}{2 \cdot 1} : - 7

二次方程组的解是:

x = - 5, x = - 7

作图

流行的例子

- 2 x^{2} + 5 x + 4 = 0

16 p^{2} - 24 p + 5 = 0

solvefor x,16x^2-m^2=0

so l v e f or x, 16 x^{2} - m^{2} = 0

x^2+6x-78=3(x-8)

x^{2} + 6 x - 78 = 3 (x - 8)

solvefor w,-32aw-15a^2=-7w^2

so l v e f or w, - 32 a w - 15 a^{2} = - 7 w^{2}