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受欢迎的代数 >

-4k^2+5k=-3k-4

解答

- 4 k^{2} + 5 k = - 3 k - 4

解答

k = 1 - 2, k = 1 + 2

+1

十进制

k = - 0.41421 \dots, k = 2.41421 \dots

求解步骤

- 4 k^{2} + 5 k = - 3 k - 4

将

4

para o lado esquerdo

- 4 k^{2} + 5 k + 4 = - 3 k

将

3 k

para o lado esquerdo

- 4 k^{2} + 8 k + 4 = 0

使用求根公式求解

k_{1, 2} = \frac{- 8 \pm 8 ^{2} - 4 ( - 4 ) \cdot 4}{2 ( - 4 )}

8^{2} - 4 (- 4) \cdot 4 = 82

k_{1, 2} = \frac{- 8 \pm 8 2}{2 ( - 4 )}

将解分隔开

k_{1} = \frac{- 8 + 8 2}{2 ( - 4 )}, k_{2} = \frac{- 8 - 8 2}{2 ( - 4 )}

k = \frac{- 8 + 8 2}{2 ( - 4 )} : 1 - 2

k = \frac{- 8 - 8 2}{2 ( - 4 )} : 1 + 2

二次方程组的解是:

k = 1 - 2, k = 1 + 2

作图

流行的例子

4/3 (x+1)^2+16=0

\frac{4}{3} (x + 1)^{2} + 16 = 0

2 \cdot x^{2} - x - 2 = 0

x^2-11x-46=-6x+4

x^{2} - 11 x - 46 = - 6 x + 4

solvefor x,x^2y-x^2+xy+3x-2=0

so l v e f or x, x^{2} y - x^{2} + x y + 3 x - 2 = 0

16 m^{2} + 8 m = 0