8 sentences

1. 这是一个非线性方程。

   zhè shì yī gè fēi​xiàn​xìng fāng​chéng.

   This is a non-linear equation.

   Source: Dong Chinese Dictionary

2. 这是一个二元一次方程。

   zhè shì yī gè èr yuán yī cì fāng​chéng.

   This is a linear equation in two variables.

   Source: Dong Chinese Dictionary

3. 他解开了量子引力方程。

   tā jiě​kāi le liàng​zǐ yǐn​lì fāng​chéng.

   He solved the quantum gravity equation.

   Source: OpenSubtitles

4. 这个复杂的方程有两个实数解。

   zhè​ge fù​zá de fāng​chéng yǒu liǎng gè shí​shù jiě.

   This complex equation has two real solutions.

   Source: Dong Chinese Dictionary

5. 一个二次方程的最高项次数是二。

   yī​gè èr​cì fāng​chéng de zuì gāo xiàng cì​shù shì èr.

   The highest degree of a quadratic equation is two.

   Source: Dong Chinese Dictionary

6. 该非线性方程在临界点产生了分歧。

   gāi fēi​xiàn​xìng fāng​chéng zài lín​jiè​diǎn chǎn​shēng le fēn​qí.

   The nonlinear equation bifurcates at the critical point.

   Source: Dong Chinese Dictionary

7. 这是一个包含两个未知数的二元方程。

   zhè shì yī gè bāo​hán liǎng gè wèi​zhī​shù de èr​yuán fāng​chéng.

   This is a linear equation with two variables.

   Source: Dong Chinese Dictionary

8. 老师在课堂上讲解了如何通过配方来解一元二次方程。

   lǎo​shī zài kè​táng shàng jiǎng​jiě le rú​hé tōng​guò pèi​fāng lái jiě yī​yuán'èr​cì fāng​chéng.

   The teacher explained in class how to solve quadratic equations by completing the square.

   Source: Dong Chinese Dictionary