Question

i want the answers of Q 2,3 and 7

Answer 1

question no. 2.)
2 to the power (2x-y)=2 to the power 5
2x-y=5......................(i)

2 to the power (x+y)= 2 to the power 4
x+y=4.........................(ii)
adding (i) & (ii),
3x=9
=> x=3
therefore y=1
so x²+y²=10
question no.3.)