What is the general form of the equation of a circle with center at (a, b) and radius of length m?

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.

Can someone me immediately, this is due by midnight! if you can't see the question, i'll text it to you. show the steps you took to get your answer.

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i