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The constant that can be added to - 3x to form a perfect square trinomial is
The given expression is
- 3x
To form a perfect square trinomial
The given expression is
- 3x
first we have to add a constant term with it
- 3x + z
By comparing the given expression and the perfect square trinomial
a = x
Similarly
-2ab = 3x
where know a =x
Then,
-2b = 3
b = -3/2
Similarly
= z
9/4 = z
Convert the simple fraction to mixed fraction
9/4 =
Hence, the constant that can be added to - 3x to form a perfect square trinomial is
The complete question is :
Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?
and
Learn more about perfect square trinomial here
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The answer would be twenty five because 
equals 
leaving you with x = 5 at a minimum. So 5x: 5 x 5 = 25
Hope this helps! :)
Hope this helps! :)