Consider a circle whose equation is x2 + 2 + 4x - 64 - 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 × 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.