Factor the expression below. x2 + 12x + 36
O A. (x + 9)(x+4)
O B. (x - 9)(x-4)
C. (x+6)(x+6)
O D. by-6)(x-6)
I was thinking c but I don’t know

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle