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Math Challenge II-A Questions 1.27-1.29

 
 
Picture of Zhi Feng Etan Kiang
Math Challenge II-A Questions 1.27-1.29
by Zhi Feng Etan Kiang - Thursday, June 4, 2020, 3:05 PM
 

May you please help me on these questions? For 1.27, I tried converting it into ab(a2-b2)+a2+b2+1. For 1.28, I converted it to m2n2-m2-n2+1+4mn, and I am completely flummoxed by 1.29. Please help me, and thank you!

 
Picture of Raymond luo
Re: Math Challenge II-A Questions 1.27-1.29
by Raymond luo - Saturday, June 6, 2020, 6:25 PM
 

For 1.27, my hint is to add and subtract ab.

For 1.28, my hint is to split 4mn into two different terms.

For 1.29, my hint is to put the expression in a quadratic.


 
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