SOLUTION: How do i group 7ac^2+2bc^2-7ad^2-2bd^2?

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Question 480649: How do i group 7ac^2+2bc^2-7ad^2-2bd^2?
Found 2 solutions by stanbon, Anthea Lawn:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
group 7ac^2+2bc^2-7ad^2-2bd^2
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7ac^2-7ad^2 + 2bc^2-2bd^2
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= 7a(c^2-d^2) + 2b(c^2-d^2)
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= (c^2-d^2) (7a+2b)
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= (c-d)(c+d)(7a+2b)
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Cheers,
Stan H.
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Answer by Anthea Lawn(22) About Me  (Show Source):