Consider a circle whose equation is x2 + y2 + 4x – 6y – 36 = 0. which statements are true? check all that apply. to begin converting the equation to standard form, subtract 36 from both sides. to complete the square for the x terms, add 4 to both sides. the center of the circle is at (–2, 3). the center of the circle is at (4, –6). the radius of the circle is 6 units. the radius of the circle is 49 units