Question

if p²+q²=5 and pq=2 , find p³-q³​

Answer 1

Answer:

p³-q³=5

Step-by-step explanation:

(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