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解一元二次不等式的步骤：

解一元二次不等式的步骤：. 1 ）将原不等式标准化：. 2 ）判断不等式对应方程是否有根，有则求之；. 3 ）绘出不等式对应函数简图，读图得解.

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解一元二次不等式的步骤：

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  1. 解一元二次不等式的步骤： 1）将原不等式标准化： 2）判断不等式对应方程是否有根，有则求之； 3）绘出不等式对应函数简图，读图得解.

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