SOLUTION: Hi could you help me factor this problem {{{(c+d)^2-(c-d)^2}}} I keep coming up with crazy answers. Thank you

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Hi could you help me factor this problem {{{(c+d)^2-(c-d)^2}}} I keep coming up with crazy answers. Thank you      Log On


   

Question 133796: Hi could you help me factor this problem
%28c%2Bd%29%5E2-%28c-d%29%5E2
I keep coming up with crazy answers. Thank you
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!
This is the difference of two squares, the pattern is a%5E2-b%5E2=%28a%2Bb%29%28a-b%29. Just substitute a=%28c%2Bd%29 and b=%28c-d%29

%28%28c%2Bd%29%2B%28c-d%29%29%28%28c%2Bd%29-%28c-d%29%29
%282c%29%282d%29
4cd