Question
If P3 + 3P2 + 3P =
7, then the value of P2+ 2P is –Solution
P3 + 3P2 + 3P = 7
P3 + 3P2 + 3P + 1= 8
(P + 1)3 = (2) 3
P + 1 = 2
P = 1
So, P2 + 2P = (1)2 + 2 × 1
= 1 + 2 = 3
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