Posted: Tue Nov 06, 2007 2:51 am
JustcallmeDrago wrote:x^2 + 4ax + 4a^2 - b^2
:evil:
If you're ever stuck on factoring a binomial you can always resort to the quadratic formula. It's obviously not the best method to use normally but can save you on a test. For this one:
-4a +- sqrt(16a^2 - 16a^2 + 4b^2) / 2
(-4a +- 2b)/2
-2a +- b
so your roots are -2a + b and -2a - b so your factors are (x + 2a + b)(x + 2a -b)