Question

What is a simpler form of the following expressions?

(7p – 8 )(7p + 8 )

Answer 1

Difference of squares.
\[(a-b)(a+b) = a^2-b^2\]In this case \(a=7p\) and \(b= 8\).
So we get
\[(7p)^2-8^2\]Which comes out to be:\[49p^2-64\]When simplified further.

Answer 2

You could also use foil, but I think they want you to recognize the difference of squares.

Answer 3

7p+-8