(2*p %2B q %2B 5)^2 – InterviewSolution

InterviewSolution

1.

(2*p %2B q %2B 5)^2

Answer»

We know,

(a + b + c)^2 = a^2 + b^2 + c^2 + 2ab + 2bc + 2ca

Hence, (2p + q + 5)^2

= (2p)^2 + q^2 + 25 + 2*2p*q + 2*q*5 + 2*5*2p

= 4p^2 + q^2 + 25 + 4pq + 10q+ 20p

= (2p + q)^2 + 5(4p + 2q + 5)

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