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Question
Subtract:
–3p2 + 3pq + 3px from 3p(– p – a – r)
Solution
We have,
–3p2 + 3pq + 3px and 3p(– p – a – r)
The required difference is given by 3p(– p – a – r) – (– 3p2 + 3pq + 3px)
= – 3p2 – 3ap – 3pr + 3p2 – 3pq – 3px
= (– 3p2 + 3p2) – 3ap – 3pr – 3pq – 3px ...[Grouping like terms]
= – 3ap – 3pr – 3pq – 3px
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