He is very good at algebra.
他的代数很好。
Eric was not good at algebra in middle school.
埃里克中学时不擅长代数。
**Solve for x in the equation 2x + 5 = 11.**
解这个方程 2x + 5 = 11 中的 x。

**The distributive property states that a(b + c) = ab + ac.**
分配律表示为 a(b + c) 等于 ab + ac。
**In algebra, a variable represents an unknown value.**
在代数中，变量代表一个未知值。
**To factor an expression like x^2 - 9, we recognize it as a difference of squares.**
要分解因式表达式如 x^2 - 9，我们认识到它是一个平方差。
**The quadratic formula, x = (-b ± √(b^2 - 4ac)) / 2a, is used to solve quadratic equations.**
二次公式 x = (-b ± √(b^2 - 4ac)) / 2a 用于解二次方程。
**Simplifying the expression 3x + 2x yields 5x due to the combining like terms rule.**
简化表达式 3x + 2x 得到 5x，这是根据合并同类项的规则。
**To find the roots of a polynomial, we can use synthetic division or the rational root theorem.**
为了找到多项式的根，我们可以使用合成除法或有理根定理。
**Linear equations, such as y = mx + b, represent straight lines on a graph.**
线性方程，如 y = mx + b，在图上表示直线。
**Algebraically, solving inequalities like 2x - 3 < 5 involves isolating the variable x.**
代数上，解不等式如 2x - 3 < 5 涉及将变量 x 隔离出来。
**The commutative property of addition tells us that a + b = b + a.**
加法的交换律告诉我们 a + b = b + a。