SOLUTION: how do you find a missing term that will make a trinomial a perfect square trinomial?

Question 29752: how do you find a missing term that will make a trinomial a perfect square trinomial?
Found 2 solutions by ikdeep, Cintchr:
Answer by ikdeep(226) (Show Source): You can put this solution on YOUR website!
For better understanding, please provide a suitable problem.
Answer by Cintchr(481) (Show Source): You can put this solution on YOUR website!
taking an expression such as ....

the leading coefficient (the # by the x^2) must be 1
use the formula

so the last term is 16
to check ...
plug in 16
factor

since 4^2=16 and 4+4=8 it is right.

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