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b. -2p (8p + 7 )
= -16p² -14p + 3p + 9q
= -16p²-11p+9q
=-20x-7y
b. (3p+9q)-2p(8q+7)
=3p+9p-16pq-14p
=12p-14p-16pq
=-2p-16pq