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新gre数学重要考点知识21

信息来源：网络发布时间:2012-01-04

　　新gre数学重要考点：Subtracting Polynomials

　　Subtracting Polynomials

　　To subtract polynomial from another, subtract the like terms. Like terms are those with the same variable and identical power.

　　Example:

　　By subtracting (3x+2) from (4x2-x+2),we get 4x2+(-1-3)x+(2-2)=4x2-4x.

　　Remember:

　　Only subtract the like terms.

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