Question

How do I do this algebra??

Answer 1

75

Explanation:

Square both sides. 225=3x^2

divide both sides by 3

x^2=75

x=√75= 5√3

Answer 2

`15 = x √(3) \\ \\ 1. \: 15 = √(3x) \\ 2. \: (15)/( √(3) ) = x \\ 3. \: x = (15)/( √(3) )`