SOLUTION: (a -9b)(2a + 7b) 2a2 - 11ab - 63b2 not sure if this has been solved correctly and if I missed a step

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Question 45476: (a -9b)(2a + 7b)
2a2 - 11ab - 63b2
not sure if this has been solved correctly and if I missed a step
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Looks good.
Cheers,
Stan H.