SOLUTION: 12 – 4a – 3b – ab use factoring by grouping to factor it Please advise the answer.

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Question 701316: 12 – 4a – 3b – ab
use factoring by grouping to factor it
Please advise the answer.
Answer by neatmath(302) About Me  (Show Source):
You can put this solution on YOUR website!

12-4a-3b-ab given

%2812-4a%29-%283b-ab%29 group the terms to see if it will work

4%2A%283-a%29-3b%2A%283-a%29 factor 4 out of the first group, and 3b out of the second

And you can see that we do have a common term of (3-a).

%284-3b%29%283-a%29 final factored form

Factoring by grouping can be fairly tricky.

But this is a good example of how it works.

It is not the most common of factoring methods, but it is good to be aware of.

I hope this helps! Keep practicing! :)

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