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3.
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If the polynomial 3a2 - 3an2 - 2an + 2n3 is to
be factored by grouping pairs of terms, which grouping is not helpful?
a. | 3a2 paired with -3an2 and -2an paired with
2n3 | c. | 3a2 paired with 2n3 and -3an2 paired with
-2an | b. | 3a2 paired with -2an and -3an2 paired with
2n3 | d. | All the
above pairings are helpful. |
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