Question

What must be added to y^2-3y​

Answer 1

`(y-1.5)^2`

Explanation:

I’m guessing you want a perfect square trinomial.

b=-3

`(b)/(2)=-1.5`

`(-1.5)^2=2.25`

You need to add 2.25 to the binomial to create a perfect square trinomial.