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受欢迎的代数 >

-k^2-k+6=0

解答

- k^{2} - k + 6 = 0

解答

k = - 3, k = 2

求解步骤

- k^{2} - k + 6 = 0

使用求根公式求解

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

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

k_{1, 2} = \frac{- ( - 1 ) \pm 5}{2 ( - 1 )}

将解分隔开

k_{1} = \frac{- ( - 1 ) + 5}{2 ( - 1 )}, k_{2} = \frac{- ( - 1 ) - 5}{2 ( - 1 )}

k = \frac{- ( - 1 ) + 5}{2 ( - 1 )} : - 3

k = \frac{- ( - 1 ) - 5}{2 ( - 1 )} : 2

二次方程组的解是:

k = - 3, k = 2

作图

流行的例子

2 0^{2} + 6^{2} = c^{2}

5 a^{2} + 2 a - 33 = 0

a^{2} + 3 a + 1 = 0

(1) = x^{2}

(1-0.0038)^5=(1-0.0054)^3(1+x)^2

(1 - 0.0038)^{5} = (1 - 0.0054)^{3} (1 + x)^{2}