本文是为大家新总结的GRE数学考试的考点，是关于Subtracting Monomials的知识点，希望大家多多积累这些基础的知识点。
Subtracting Monomials
To subtract a monomial from another of the same variables just subtract the coefficients. Only two like monomials can be subtracted from each other.
Example:
By subtracting 3x from 4x, we get (4-3)x=x.
By subtracting 3xy from 2xy, we get (2-3)xy=-xy.
By subtracting bx from ax, we get ax-bx=(a-b)x.
Remember:
Monomials can be subtracted only if they have the same variables with identical powers.
大家在复习GRE数学的时候，一定要把新GRE数学的基础打牢。
