gre数学概率知识点|GRE数学重要知识点:SubtractingMonomials

副标题:GRE数学重要知识点:SubtractingMonomials

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  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.


GRE数学重要知识点:Subtracting Monomials.doc

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