Q.30 Subtract by column method.
(ii) --p2 + 5q2 - 7r from 6p2 -- q2 + 2r
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heya mate... here is your answer
6p2 - q2 - 2r
- -p2 - 5q2 - 7r
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7p2 - 6q2 - 9r
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