I didn't downvote you
we know that 1^2=1 and 3^2=9 so x=sqrt((1+9)/2)=sqrt(10/2)=sqrt5 so out=r final answer is \(\boxed{x=\sqrt5}\)
Well i got even worse like i lost 200 points in 2 days! I think there is this crowd of bullies downvoting people for no reason