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Math Challenge II-A (AMC 10) Summer 2017 (Algebra) Homework Problem 1.27

 
 
ZhangLawrence的头像
Math Challenge II-A (AMC 10) Summer 2017 (Algebra) Homework Problem 1.27
ZhangLawrence - 2017年06月11日 Sunday 22:03
 

Hello Mr. John:

I have some trouble factoring 1.27. May I have a hint?

(As a side comment, was the word "factor" left out incidentally on the problem?)

                                                                                                                           Thanks, Lawrence

 
ReynosoDavid的头像
Re: Math Challenge II-A (AMC 10) Summer 2017 (Algebra) Homework Problem 1.27
ReynosoDavid - 2017年06月12日 Monday 15:33
 

Try adding and subtracting $ab$ to the expression. That should let you factor by grouping some of the terms. 

 
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