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受欢迎的代数 >

2x^2-5x=2x

解答

2 x^{2} - 5 x = 2 x

解答

x = \frac{7}{2}, x = 0

+1

十进制

x = 3.5, x = 0

求解步骤

2 x^{2} - 5 x = 2 x

将

2 x

para o lado esquerdo

2 x^{2} - 7 x = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 7 ) \pm ( - 7 ) ^{2} - 4 \cdot 2 \cdot 0}{2 \cdot 2}

(- 7)^{2} - 4 \cdot 2 \cdot 0 = 7

x_{1, 2} = \frac{- ( - 7 ) \pm 7}{2 \cdot 2}

将解分隔开

x_{1} = \frac{- ( - 7 ) + 7}{2 \cdot 2}, x_{2} = \frac{- ( - 7 ) - 7}{2 \cdot 2}

x = \frac{- ( - 7 ) + 7}{2 \cdot 2} : \frac{7}{2}

x = \frac{- ( - 7 ) - 7}{2 \cdot 2} : 0

二次方程组的解是:

x = \frac{7}{2}, x = 0

作图

流行的例子

solvefor y,xy+y^2=2

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

t^{2} - 5 t - 36 = 0

x^{2} + x^{2} = 4^{2}

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

solvefor x,x^2y+5xy+4y=0

so l v e f or x, x^{2} y + 5 x y + 4 y = 0