Usually, x is a quadratic equation , x has two different solutions.

二次方程式通常都有两个不同的解.

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The child then knows how to solve a quadratic equation.

于是学生就会解二次方程了.

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And he inherited al - Khwarizmi's solution to quadratic equation.

同时,他继承了前辈花拉子米关于一元二次方程的解法.

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