Arthur D. answered • 03/12/17
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28x^3+16x^2-21x-12
28x^3-21x+16x^2-12
7x(4x^2-3)+4(4x^2-3)
(4x2-3)(7x+4)
Arthur D.
tutor
yes, (28x^3-21x)+(16x^2-12)
group the 1st term and the 3rd term, group the 2nd term and the 4th term
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