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受欢迎的代数 >

s/2+(s^2)/2-3=0

解答

\frac{s}{2} + \frac{s ^{2}}{2} - 3 = 0

解答

s = 2, s = - 3

求解步骤

\frac{s}{2} + \frac{s ^{2}}{2} - 3 = 0

在两边乘以

2

s^{2} + s - 6 = 0

使用求根公式求解

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

1^{2} - 4 \cdot 1 \cdot (- 6) = 5

s_{1, 2} = \frac{- 1 \pm 5}{2 \cdot 1}

将解分隔开

s_{1} = \frac{- 1 + 5}{2 \cdot 1}, s_{2} = \frac{- 1 - 5}{2 \cdot 1}

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

s = \frac{- 1 - 5}{2 \cdot 1} : - 3

二次方程组的解是:

s = 2, s = - 3

作图

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