Solve Equations with Rational Expressions Algebra 2 help ?/

1. (2x + 3 ) ^ 1 / 2 = 4

2. ( 5x - 5 ) ^ 2 / 3 = 16

1. I'm assuming it's this:
(2x + 3)^(1/2) = 4

Square both sides:
2x + 3 = 16
2x = 13
x = 13/2

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2. (5x - 5)^(2/3) = 16
(5x - 5)^(2/3) = 2^4
(5x - 5)^2 = 2^12
5x - 5 = 2^6 = 64
5x = 69
x = 69/5

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1. Square both the sides,and then solve
2x + 3=16
x=13/2

2. Take square root of both the sides and then cube bothe the sides
5x-5=64
x=69/5

1.Square both sides
2x+3 = 16
2x = 13
x=6.5

2.
Cube both sides then take the square root
5x-5=64
5x=69
x=13.8