Math problems?

Question

find the solutions for the ff: (value/s of x)

1) sqrt of (2x + sqrt of 7x+x) = 3
2) 4th root of x + 2 sqrt of x = 3

Answer 1

2)
4th root of x + 2 sqrt of x = 3
let sqrt(x)=t
t^2+2t-3=0
t1=1
t2=-3 impossible

hence sqrt(x)=1
x=1