Question

If p+q=10 and pq=5,then the numerical value of p/q+q/p will be​

Answer 1

P/q + q/p = p² + q² / pq

p + q = 10

Squaring both sides

( p + q )² = 100

p² + q² = 100 - 2 ( 5 )

p² + q² = 90

So, p² + q² / pq = 90 / 5 = 18