SOLUTION: Factor. 36-49z^2

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Question 273233: Factor.
36-49z^2
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Factor:
36-49z%5E2 Rewrite this as the difference of squares:
%286%29%5E2-%287z%29%5E2 The difference of squares can be factored thusly:
A%5E2-B%5E2+=+%28A%2BB%29%28A-B%29 so...
%286%29%5E2-%287z%29%5E2+=+highlight%28%286%2B7z%29%286-7z%29%29