GRE考試數學概念及解析

GRE考試數學概念及解析，相信這個問題是許多正在準備留學的同學關心的一個問題，那么下面小編就來和大家說一說，感興趣的您趕緊往下了解吧。

To add two monomials of the same variables just add the coefficients.

Only two like monomials can be added together.

Example:

By adding 3x and 4x, we get (3+4)x=7x.

By adding 3xy+2xy, we get (3+2)xy=5xy.

By adding as and bx, we get ax+bx=(a+b)x.

Remember:

Monomials can be added only if they have the same variables with identical powers.

GRE考試數學考點：Algebraic Expression

One or many terms connected by algebraic operations is called an algebraic expression. The operations between the terms must be valid to yield an expression.

Example

(3x+5),(ax2+c),and (xy+a)(x+y) are all algebraic expressions.

(2x+5)+·(3x) is not an expression since + followed by· is not a valid sequence of operations.

Remember

There is no=sign in an expression.

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