Which of the following expression has (7p-9-3r) as one of its factors?
a) 49p2 +q-9r2 +14pq
c) 49p +q° -9r +14pg
b) 49p -q? -9r2 - 14 pq
d) 49p+q? - 972 - 14pq
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It is C because it is obvious
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