The measure of an interior angle of regular polygon four times the measure of an exterior angle of the same polygon . what is the name of the polygon

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

the height of the surface increases from the center out to the sides of the road

it is c!