GRE考试数学概念及解析

时间:2022-08-04 04:09:33 GRE考试 我要投稿
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GRE考试数学概念及解析

  GRE考试数学考点:Adding Monomials

GRE考试数学概念及解析

  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考试数学考点: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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