Square roots on a number line - 4th part

Root, Square
Choose the values of the a, n and b sliders and notice how to construct the given number on the number line. All the time you can change the values of the a, n and b sliders. If needed, use the 'unit segment' slider to zoom the number line and move the origin point.
Can you make such constructions on the paper? E.g. try to construct 3√2-5, -√3-1, -2√5+6 and √8+2. You can use the applet to check yout constructions.