SOLUTION: Factorise: a^2 - (c-d)^2

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Question 1084509: Factorise: a^2 - (c-d)^2
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!

Use the fact that +%28x%5E2-y%5E2%29+=+%28x-y%29%28x%2By%29+ to get:
+a%5E2+-+%28c-d%29%5E2+ = +%28a-%28c-d%29%29%2A%28a%2B%28c-d%29%29+