± 
A trick to factoring a perfect square trinomial would to write it as 
±
. (When doing this, the sign in the middle is determined by the middle sign in the original trinomial). 
is known as a perfect square trinomial, too. Its first and last terms are both perfect squares (6x squared makes 
, 7 squared makes 49) and the middle term is 2 times the square roots of both of the other terms ( 
is 
). 
, also known as (6x-7) (6x-7). Factor( special patterns): 36x^2-84x+49
...
Answers: 1
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