(2p+ 3q)3 – (2p – 3q)3 – 18q (4p2 - 9q2)
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Answer:
2p+3q=18⟹p=
2
18−3q
4p
2
+4pq−3q
2
−36=0
⟹4(
2
18−3q
)
2
+4(
2
18−3q
)q−3q
2
−36=0
⟹324−36=(108−36)q
⟹72q=288
⟹q=4
⟹p=
2
18−12
=3
⟹2p+q=2(3)+4=10
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