quadratic equation meaning in English

二次方程式。

Some quadratic equations have no real roots .
某些二次方程没有实数根。
Application of properties of quadratic equations
二次方程性质的应用
Roger can solve quadratic equations as easy as falling off a log
罗杰能轻而易举地解二次方程式。
The branch of algebra that deals with quadratic equations
二次方程式论处理二次方程式的代数学的分支
But only with quadratic equations ,
但是只有二次方程

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