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QUESTION
Q
If p − 2q = 4, then the value of p3 − 8q3 − 24pq − 64 is :
Solution
p − 2q = 4(p − 2q)3 = 43 p3 − 2q3 − 3(p)(2q)(p − 2q) = 64 [since...
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Solution
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Keynote
(a − b)3 = a3 − b3 − 3ab(a − b)
The alternate way of solving these type of problems is by SUBSTITUTION METHOD
Given, p − 2q = 4Consider p, q values that satisfy the above equation...
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