Question

if 3 raise to power 2 x minus Y is equal to 243 and 3 raise to power x + Y is equal to 81 then X square + Y square is​

Answer 1

3^(2x-y) = 243 = 3^5

complaring power

2x - y = 5 .....i)

3^(x+y) = 3^4

x + y = 4 ......ii)

adding i) and ii)

3x = 9 , x = 3

y = 1

hope it helped you