Question

if p² + q² = 5 and pq = 2 what is p³ - q³​

Answer 1

Answer:

Hey take value of pand q and multiply it 3 time .ie take cube root you will get answer

Answer 2

(p-q) ²=p²+q²-2pq=5-2(2) =1

(p-q) =√1=±1

take 1,

p³-q³=(p-q) ³-3pq(p-q)=1-3(2)(1)=-5

now -1,

p³-q³=5