Question

Two resistances when connected in parallel give resultant value of 2 ohm, when connected
in series the value becomes 9 ohm. Calculate the value of each resistance.

Answer 1

for parallel
so let that two resistanxe be x and y
so xy/x+y = 2

x+y =xy/2

so.for series it will be x + y =9

equating both so we get x + y as 9 and xy as 18

only 1 possibilities one is 6 ohm and one is 3ohm

Answer 2

Hey here is your answer:-
R1=3,R2=6
if, R1=6 ,R2=3