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受欢迎的代数 >

x^2-25x+58=-10x+8

解答

x^{2} - 25 x + 58 = - 10 x + 8

解答

x = 10, x = 5

求解步骤

x^{2} - 25 x + 58 = - 10 x + 8

将

8

para o lado esquerdo

x^{2} - 25 x + 50 = - 10 x

将

10 x

para o lado esquerdo

x^{2} - 15 x + 50 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 15 ) \pm ( - 15 ) ^{2} - 4 \cdot 1 \cdot 50}{2 \cdot 1}

(- 15)^{2} - 4 \cdot 1 \cdot 50 = 5

x_{1, 2} = \frac{- ( - 15 ) \pm 5}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 15 ) + 5}{2 \cdot 1}, x_{2} = \frac{- ( - 15 ) - 5}{2 \cdot 1}

x = \frac{- ( - 15 ) + 5}{2 \cdot 1} : 10

x = \frac{- ( - 15 ) - 5}{2 \cdot 1} : 5

二次方程组的解是:

x = 10, x = 5

作图

流行的例子

x^{2} - 9 x + 64 = 0

4 x^{2} - 20 x + 17 = 0

- 2 = x^{2} - 3 x

2 x^{2} + x - 136 = 0

x + \frac{x ^{2} + 4}{5} = 2