输入方程即可获得解,步骤和相应图形.

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$$ax^4 + bx^2 + c = 0 \ \ \ (a \ne 0)$$ 令 $x^2$ 为 $y \ (y \ge 0)$,就变成了一个二次方程式,可以求出它的两个根 $y_1, y_2$。 二次次方程式的根可通过如下方式求出:

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