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受欢迎的代数 >

2x^1-x^2=0

解答

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

解答

x = 0, x = 2

求解步骤

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

整理后得

2 x - x^{2} = 0

改写成标准形式

a x^{2} + b x + c = 0

- x^{2} + 2 x = 0

使用求根公式求解

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

2^{2} - 4 (- 1) \cdot 0 = 2

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

将解分隔开

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

x = \frac{- 2 + 2}{2 ( - 1 )} : 0

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

二次方程组的解是:

x = 0, x = 2

作图

流行的例子

0.1x^2+0.2x-44=0

0.1 x^{2} + 0.2 x - 44 = 0

10 (x^{2} + 1) = 1

solvefor x,f(x+h)=5(x+h)^2+8(x+h)-3

so l v e f or x, f (x + h) = 5 (x + h)^{2} + 8 (x + h) - 3

m^{2} + 8 m - 9 = 0

151 t - 16 t^{2} = 88