Question

y^2-6y+9=4....(y-3)^2=4?

Answer 1

or we could actually subtract he 4 from both side and end up with:
y^2-6y+5, which can actaully be factored

Answer 2

but what you have is also correct if we write it as: (y-3)^2-4

Answer 3

oh so its a minus not equal sign?

Answer 4

well, i mean if you write its as : (y-3)^2-4=0

Answer 5

oki see thanks