plz help me. give ans in pic. q no. 27
Attachments:
Answers
Answered by
1
hey dear put the value of p=4-q in p^3+q^3+12pq teh solve it
Answered by
2
p = 4 - q
=> p + q - 4 = 0
=> p + q + (-4) = 0
Now,
We know that, if a +b +c = 0
Then,
a^3 + b^3 + c^3 = 3abc
=> (p)^3 + (q)^3 + (-4)^3 = 3(p)(q)(-4)
=> p^3 + q^3 - 64 = - 12pq
=> p^3 + q^3 + 12pq = 64
Hence Proved...
=> p + q - 4 = 0
=> p + q + (-4) = 0
Now,
We know that, if a +b +c = 0
Then,
a^3 + b^3 + c^3 = 3abc
=> (p)^3 + (q)^3 + (-4)^3 = 3(p)(q)(-4)
=> p^3 + q^3 - 64 = - 12pq
=> p^3 + q^3 + 12pq = 64
Hence Proved...
Similar questions