SOLUTION: Is the following trinomial a perfect square? why or why not
x^2+18x-81
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Question 119955: Is the following trinomial a perfect square? why or why not
x^2+18x-81
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
It can't be because of the (-) sign in front of the 81
The perfect square can only have two forms
or
The 1st gives me
and the 2nd gives me
Notice that the sign in front of the constant term, is
(+) in both cases
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