Stuart R. answered • 08/20/13
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Math Tutor - Online and In Home -20 Years Experience
In your text book, there is a section showing that (a+b)(a-b) = a2 - b2. (the middle term cancels out.)
Applying this knowledge (ab+7)(ab-7) = (ab)2 - 72
so the answer is (ab)2 - 49 or a2b2 -49 they are the same.
Stuart R.
I agree. There are many on this site who are just looking to get through homework or tests.
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08/20/13
Kirill Z.
Looks like this guy wants the answers to every homework problem he's got. I gave him basics, you and one other guy gave couple answers. I suggest we stop here and make him do some work himself. All those problems are identical in the sense that they are on the application of the same formula. He must be able to figure the rest himself.
08/20/13