In which quadrant does the complex number lie?

Find,

Refer to the above diagram, which shows two points on the complex plane. Let and stand for the complex numbers represented by their respective points.

Add and .

Give the -intercept(s) of the parabola with equation . Round to the nearest tenth, if applicable.

In which quadrant does the complex number lie?

Refer to the above diagram, which shows two points on the complex plane. Let and stand for the complex numbers represented by their respective points.

Multiply by .

In which quadrant does the complex number lie?

Refer to the above diagram, which shows four points on the complex plane.

Select the point which gives the result of the addition

The graph below represents which complex number?