MiaKitty
[8.02] Determine whether the following polynomials can be factored by grouping. If so, factor the polynomials showing all work. If not, explain why this method will not work.
a.4x2 + 12xy + 2x + 2y
b.3m2 + 6mn + 7m + 14n
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MiaKitty
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The first one is factored by grouping, I am confused on the 2nd. :D
MiaKitty
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I think...HELP!!!
dpgreen
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yes it can
take out the 3m from the first part and 7 from the second
MiaKitty
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Ok, thx. :)
dpgreen
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you get 3m(m+2n)+7(m+2n)
dpgreen
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then you can simplify it as (3m+7)(m+2n)
dpgreen
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good enough?
MiaKitty
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Hmm...yes, can you show me the first one to make sure?
MiaKitty
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a.4x2 + 12xy + 2x + 2y
dpgreen
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yeah....im not so sure about the first one...i dont think you can do it by group factoring because it can't be factored unless done by completing the square or using the quadratic formula
dpgreen
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wait...you did learn about breaking it up into 3 and 1 or 2 and 2 right?
MiaKitty
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Yes, I really don't understand this!!! I hate math and science. :(
dpgreen
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lol, I'm not a big fan either, but im pretty sure you cant do the first one, let me look it up
dpgreen
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yeah..you can't
MiaKitty
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Oh, wow, lol! Then what do I say?
dpgreen
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they will all have to become a diff of squares to be solvable for the first one
dpgreen
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A. cannot be factored by grouping
B. can
MiaKitty
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Oh, lol! Thx!! :D totally think this stuff is hard!!
MiaKitty
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Now I need the other one aboutr Jose. :)