Question 1168747

Please list the steps to Simplify the below problem?  I come up with 2a after multiplication and cancellation 

a^2 - b^2 * 2a^2 - 2a = (a + b) (a - b) * 2(a^2 - a) = 2^3b    = 2a
a^2 - ab     a - 1       a(a - b) * a - 1              a^2 -b

Thank you
<pre>{{{matrix(1,11, (a^2 - b^2)/(a^2 - ab), "*", (2a^2 - 2a)/(a - 1), "=", (a + b)(a - b)/a(a - b), "*", 2(a^2 - a)/(a - 1), "=", 2^3b/(a^2 -b), "=", 2a)}}} <b> <====== This is what you have.</b>
{{{matrix(1,15, (a^2 - b^2)/(a^2 - ab), "*", (2a^2 - 2a)/(a - 1), "=",
(a + b)(a - b)/a(a - b), "*", 2a(a - 1)/(a - 1), "=", 
(a + b)cross((a - b))/cross(a)cross((a - b)), "*", 2cross(a)*cross((a - 1))/cross((a - 1)),
"=", "2(a + b),", or, 2a + 2b)}}} <b> <====== This is what you should have.</b>
Compare them and you'll see where you went wrong!!