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受欢迎的代数 >

-2x^2+4x-6=0

解答

- 2 x^{2} + 4 x - 6 = 0

解答

x = 1 - 2 i, x = 1 + 2 i

求解步骤

- 2 x^{2} + 4 x - 6 = 0

使用求根公式求解

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

化简

4^{2} - 4 (- 2) (- 6) : 42 i

x_{1, 2} = \frac{- 4 \pm 4 2 i}{2 ( - 2 )}

将解分隔开

x_{1} = \frac{- 4 + 4 2 i}{2 ( - 2 )}, x_{2} = \frac{- 4 - 4 2 i}{2 ( - 2 )}

x = \frac{- 4 + 4 2 i}{2 ( - 2 )} : 1 - 2 i

x = \frac{- 4 - 4 2 i}{2 ( - 2 )} : 1 + 2 i

二次方程组的解是:

x = 1 - 2 i, x = 1 + 2 i

作图

流行的例子

solvefor x,x^2+y^2+z=1

so l v e f or x, x^{2} + y^{2} + z = 1

solvefor x,f=x^2y^2-x^2y^3+13

so l v e f or x, f = x^{2} y^{2} - x^{2} y^{3} + 13

3 x^{2} + 4 x - 12 = 0

solvefor x,x^2-2x=0

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

x^{2} + 9 x - 18 = 0