sqrt(x-3)=3/2 x-3=9/4 x=21/4=5,25
2^(√(x-3))=2^(-1)*(2^5)^1/2
2^(√(x-3)=2^(-1)*2^(5/2)
2^(√(x-3))=2^(5/2-1)=2^(3/2)
√(x-3)=3/2
