Question
how do you factor a^2-100 completely?
Answers
Steve
just use the old (a-b)(a+b) = a^2 - b^2
a^2 - 100 = (a+10)(a-10)
whew. At first I thought I'd read a^100 - 1. That would have had a few more factors!
a^2 - 100 = (a+10)(a-10)
whew. At first I thought I'd read a^100 - 1. That would have had a few more factors!