Question

if p+q=√13 and p-q=√5 then the value of pq is?​

Answer 1

Answer:

4

Step-by-step explanation:

adding we get 2p=root13+root5

p=(root13+root5)/2

q=root13 - p........(1)

put p in (1)

we get q=root13 - (root13+root5)/2

q=(2×root13 - root13-root5)/2 by taking LCM

q=( root13-root5)/2 ........(2)

pq=(1)×(2)

pq=(13-5)/2=8/2=4