Question

What must be added to y^2-3y​

Answer 1

Answer:

$(y-1.5)^2$

Step-by-step explanation:

I’m guessing you want a perfect square trinomial.

b=-3

$\frac{b}{2}=-1.5$

$(-1.5)^2=2.25$

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