I need help with this !

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

How can (square root of 25) ^2 be rewritten?

What is perpendicular to y=-1/2x+11