Question

How do you factor: `y= x^2 -6x + 9`?

Answer 1

`color(white)(xx)y=(x-3)^2`

Explanation:

`color(white)(xx)y=x^2-6x+9`
`color(white)(xx)=(x-3)^2`

Further explanation (via حكيم ا. and
Tony B ):

`color(white)(xx)Delta=36-4xx9`
`color(white)(xxx)=0`

`=>x_(1, 2)=-b/(2a)`
`color(white)(xxxxx)=6/2`
`color(white)(xxxxx)=3`
graph{(x-3)^2 [-10, 10, -5, 5]}