p3-q3 if p-q=10/9 , pq=5/3
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Given:
- and
To find:
- Find the value of
Solution:
Identity to be used:
Step 1:
Take cube of eq1.
Apply identity.
Step 2:
Put value from eq1 and eq2 in eq3.
or
or
or
or
or
Thus,
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