What number must you add to the polynomial below to complete the square?

x^2 - 3x

A. 9/4
B. 3/2
C. -9/4
D. -3/2

Question

What number must you add to the polynomial below to complete the square? 

x^2 - 3x

 		A.	9/4
 		B.	3/2
 		C.	-9/4
 		D.	-3/2

erak · Answer

I think it should be A

anonymous · Answer

@Erak please write the way too how you get the right answer not just directly the answer please

erak · Answer

I was looking for an explanation, that's why I said "I think" at first

anonymous · Answer

so than you say that is A. so can you prove it too that is right answer ? thank you

erak · Answer

The negative b value threw me off, but just taking 3/2 and squaring it will give you 9/4. I was just solving it on a piece of paper to make sure.