3.	Factor each of the following expressions.
		a.   x2 + 14x + 49
				Answer:  
	b.	81w2 – 36wz + 4z2
				Answer:  

4.Mila factored m2 + 12mn + 144n2 as shown.
I know that since   and  , the first and third terms of the trinomial are perfect squares. This means that m2 + 12mn + 144n2 = (m + 12)2.
	
Comment of Mila’s strategy.  This written "strategy" is only a necessary condition, but it is not sufficient. You should look in the middle term too.
		Answer:   =/= 

Comment on Mila's answer: Factoring  DOES NOT result in  

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