Hi, there--
Problem:
Factor this expression using the difference of two squares. Assume that variables represent whole numbers.
Answer:
The difference of two square factoring method is useful when you have one expression
subtracted from another AND you can write both expressions in the form of something-
squared.
In this case, you subtract 1 from (y-9}^2. Both of these can be written as something-squared:
1 = 1^2 and (y-9)^2 is already in that form.
Difference of two squares factors like this:
In your problem:
We can simplify this:
~Mrs. F.
