Question

if p=4-q, prove that p3+q3+12pq=64

Answer 1

Given,

p = 4-q

Now,

LHS = p³ + q³ + 12pq

= (4-q)³ + q³ + 12(4-q)q

= 64 - q³ - 3×(4)²×q + 3×4×q² + q³ + 48q -12q²

= 64 - 48q + 12q² + 48q - 12q²

= 64

= RHS

Answer 2

Bro this may help u. ..