Question

factor x^2-18x+81

Answer 1

\[(x-9)^2\]

Answer 2

This would be (x-9)(x-9)

Answer 3

right?

Answer 4

yup

Answer 5

a 'perfect square because
\[81=(-9)^2\] and \[2\times -9=-18\]

Answer 6

that was the point of your previous problem, to see if you can recognize a perfect square

Answer 7

okay so, how do you know if its a perfect square or not?

Answer 8

if it can be writen as (x-a)^2. that means that it has been simplified because both sides were equal to eachother