一元二次方程解方程练习题

完成时间：_________ 分钟 满分：100 分 得分：_________

一、用配方法解下列方程（共4题，每题6分，共24分）

1. 用配方法解方程：$$x^2 + 6x - 7 = 0$

解：_________________________________________________________________

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2. 用配方法解方程：$$x^2 - 8x + 12 = 0$

解：________________________________________

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3. 用配方法解方程：$x^2 + 3x - 10 = 0$

解：________________________________________

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4. 用配方法解方程：$$x^2 - 2x - 4 = 0$

解：________________________________________

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二、用公式法解下列方程（共4题，每题6分，共24分）

1. 用公式法解方程：$$2x^2 - 3x - 2 = 0$

解：________________________________________

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2. 用公式法解方程：$$x^2 - 5x + 3 = 0$

解：________________________________________

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3. 用公式法解方程：$$3x^2 + 5x - 2 = 0$

解：________________________________________

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4. 用公式法解方程：$$x^2 - 4x - 1 = 0$

解：________________________________________

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三、用因式分解法解下列方程（共4题，每题6分，共24分）

1. 用因式分解法解方程：$$x^2 - 9 = 0$

解：________________________________________

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2. 用因式分解法解方程：$$x^2 - x - 6 = 0$

解：________________________________________

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3. 用因式分解法解方程：$$x^2 - 4x + 3 = 0$

解：________________________________________

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4. 用因式分解法解方程：$$2x^2 + 5x + 2 = 0$

解：________________________________________

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四、用适当方法解下列方程（共4题，每题7分，共28分）

1. 用适当方法解方程：$$x^2 - 5x + 6 = 0$

解：________________________________________

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2. 用适当方法解方程：$$x^2 + 4x + 4 = 0$

解：________________________________________

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3. 用适当方法解方程：$$3x^2 - 12 = 0$

解：________________________________________

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4. 用适当方法解方程：$$x^2 - 3x - 1 = 0$

解：________________________________________

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