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受欢迎的代数 >

k^2+10k-3=0

解答

k^{2} + 10 k - 3 = 0

解答

k = - 5 + 27, k = - 5 - 27

+1

十进制

k = 0.29150 \dots, k = - 10.29150 \dots

求解步骤

k^{2} + 10 k - 3 = 0

使用求根公式求解

k_{1, 2} = \frac{- 10 \pm 1 0 ^{2} - 4 \cdot 1 \cdot ( - 3 )}{2 \cdot 1}

1 0^{2} - 4 \cdot 1 \cdot (- 3) = 47

k_{1, 2} = \frac{- 10 \pm 4 7}{2 \cdot 1}

将解分隔开

k_{1} = \frac{- 10 + 4 7}{2 \cdot 1}, k_{2} = \frac{- 10 - 4 7}{2 \cdot 1}

k = \frac{- 10 + 4 7}{2 \cdot 1} : - 5 + 27

k = \frac{- 10 - 4 7}{2 \cdot 1} : - 5 - 27

二次方程组的解是:

k = - 5 + 27, k = - 5 - 27

作图

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