The other tutor's answer is absolutely correct, but it may be helpful at some point to remember that ANY polynomial term can be considered a square. Hence:
is the difference of two squares just as much as is. You simply have to re-write it as:
and then the factorization would be:
Here's another example:
can be considered as the difference of two squares if you write it:
And would then factor as:
Where is the imaginary number defined by
John
My calculator said it, I believe it, that settles it
