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Question
Expand polynomial:
(−3p−7q)(5p−q)
Expand polynomial:
(−3p−7q)(5p−q)
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Solution
From question,
(−3p−7q)(5p−q)=−3p×5p−3p×−q−7q×5p−7p×−q=−15p2+3pq−35pq+7q2=7q2+3pq−35pq−15p2=7q2−32pq−15p2
From question,
(−3p−7q)(5p−q)=−3p×5p−3p×−q−7q×5p−7p×−q=−15p2+3pq−35pq+7q2=7q2+3pq−35pq−15p2=7q2−32pq−15p2
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