Divide 1.20m in the ratio 2: 3: 4 what's the answer

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

What expression is equivalent to (2x-1)(x-3)?

What is the reflection image of (5,-3) across the line y = -x?