SOLUTION: Find the constant term that should be added to make the following expression a perfect-square trinomial. x^2 + 18x I come up wtih x^2+2time9x+81 but I am not sure that this

SOLUTION: Find the constant term that should be added to make the following expression a perfect-square trinomial. x^2 + 18x I come up wtih x^2+2time9x+81 but I am not sure that this

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Question 120821: Find the constant term that should be added to make the following expression a perfect-square trinomial.
x^2 + 18x
I come up wtih
x^2+2time9x+81 but I am not sure that this is correct.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
You are correct. However, I would multiply 2 and 9x to get

So your answer should look like:
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