SOLUTION: Find the constant term that should be added to make the following expression a perfect-square trinomial. x2 + 5x

Question 49408: Find the constant term that should be added to make the following expression a perfect-square trinomial.
x2 + 5x

Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
To make this binomial into a perfect square trinomial, simply add the square of half the coefficient of the x-term. So you would add:
The trinomial becomes:
If you now factor this, you can see that it is a perfect square.
Check using FOIL.
Simplify to:
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