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受欢迎的代数 >

x-2/(x+3)=2x

解答

x - \frac{2}{x + 3} = 2 x

解答

x = - 2, x = - 1

求解步骤

x - \frac{2}{x + 3} = 2 x

在两边乘以

x + 3

x (x + 3) - 2 = 2 x (x + 3)

解

x (x + 3) - 2 = 2 x (x + 3) : x = - 2, x = - 1

x = - 2, x = - 1

验证解

找到无定义的点（奇点）:

x = - 3

将不在定义域的点与解相综合:

x = - 2, x = - 1

作图

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