SOLUTION: factorise 4x²- 49

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Question 39681: factorise 4x²- 49
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Factorise:
4x%5E2-49
Notice that the given expression is the difference of two squares:
%282x%29%5E2+-+%287%29%5E2
The difference of two squares is factorable:
A%5E2-B%5E2+=+%28A-B%29%28A%2BB%29
Applying this to your expression, we have:
4x%5E2-49+=+%282x-7%29%282x%2B7%29