6. Find the value of p3 – q3, if p – q = 10 and pq = 15.
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your question is incorrect please make sure its a correct question if it is p + q = 15 there's answer
it's 30 thanks me later
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[Using Identity:- (p-q)³ = p³-q³-3pq(p-q)]
=> p-q = 10 (cubing both the sides)
=> (p-q)³ = 10³
=> p³-q³-3pq(p-q) = 1000
=> p³-q³-3×15 (10) = 1000
=> p³-q³-45(10) = 1000
=> p³-q³ = 1000+450
=> p³-q³ = 1450
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