WyzAnt.comThe actual problem is:
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and I have to solve this by grouping.Thanks!
How can I solve this equation by factoring polynomials by grouping?
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1 Answer
21x3 + 6x2 -28x - 8
It looks like you can pull a 7x out of the first and third terms, and a 2 from the second and fourth:
7x(3x2 - 4) + 2(3x2 - 4)
Then factor out what's in the parentheses to get (3x2 - 4)(7x + 2)
