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Question

Multiply:

(7) (p2 + 2q) (7p2 − pq − 11)

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Solution

(p2 + 2q) (7p2 − pq − 11)
= p2(7p2 − pq − 11) + 2q(7p2 − pq − 11)
= (p2 × 7p2) − (p2 × pq) − (p2 × 11) + (2q × 7p2) − (2q × pq) − (2q × 11)
= 7p4 − p3q − 11p2 + 14p2q − 2pq2 − 22q

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