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受欢迎的代数 >

2x^2+sqrt(2)x=0

解答

2 x^{2} + 2 x = 0

解答

x = 0, x = - \frac{1}{2}

+1

十进制

x = 0, x = - 0.70710 \dots

求解步骤

2 x^{2} + 2 x = 0

使用求根公式求解

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

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

x_{1, 2} = \frac{- 2 \pm 2}{2 \cdot 2}

将解分隔开

x_{1} = \frac{- 2 + 2}{2 \cdot 2}, x_{2} = \frac{- 2 - 2}{2 \cdot 2}

x = \frac{- 2 + 2}{2 \cdot 2} : 0

x = \frac{- 2 - 2}{2 \cdot 2} : - \frac{1}{2}

二次方程组的解是:

x = 0, x = - \frac{1}{2}

作图

流行的例子

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

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

3x(x-5)-(8+2x)=4(x-7)+2x

3 x (x - 5) - (8 + 2 x) = 4 (x - 7) + 2 x

14x^2+1=6x^2+7x

14 x^{2} + 1 = 6 x^{2} + 7 x

- 6 x^{2} + 2 x - 1 = 0

completesquare q^2+11q

co m pl e t es q u a re q^{2} + 11 q