Answer:

Explanation:
We have been given an expression 
 . We are asked to convert our given expression into perfect-square trinomial.
. We are asked to convert our given expression into perfect-square trinomial.
We know that an equation in form 
 is a perfect square, if
 is a perfect square, if 

To convert our given expression into perfect-square trinomial, we need to add 
 to our given expression.
 to our given expression.

Therefore, our perfect square trianominal would be 
 .
.