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受欢迎的代数 >

x^2+16x=22

解答

x^{2} + 16 x = 22

解答

x = - 8 + 86, x = - 8 - 86

+1

十进制

x = 1.27361 \dots, x = - 17.27361 \dots

求解步骤

x^{2} + 16 x = 22

将

22

para o lado esquerdo

x^{2} + 16 x - 22 = 0

使用求根公式求解

x_{1, 2} = \frac{- 16 \pm 1 6 ^{2} - 4 \cdot 1 \cdot ( - 22 )}{2 \cdot 1}

1 6^{2} - 4 \cdot 1 \cdot (- 22) = 286

x_{1, 2} = \frac{- 16 \pm 2 86}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- 16 + 2 86}{2 \cdot 1}, x_{2} = \frac{- 16 - 2 86}{2 \cdot 1}

x = \frac{- 16 + 2 86}{2 \cdot 1} : - 8 + 86

x = \frac{- 16 - 2 86}{2 \cdot 1} : - 8 - 86

二次方程组的解是:

x = - 8 + 86, x = - 8 - 86

作图

流行的例子

(1 - x) (2 - x) = 0

4y^2-1.6y+0.1225=0

4 y^{2} - 1.6 y + 0.1225 = 0

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so l v e f or f, 2 f + x (f)^{2} = 10

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solvefor a,(a^2-b^2)/9 =a+b

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