Identify Critical Points - Page 25

Questions
  • How do you find the radius of a circle with the equation #x^2 + y^2 + 4x - 8y + 13 = 0#?
  • How do you find the radius and center of a circle with the equation #( x - 1) ^2 + (y - 3) ^2 =16#?
  • How do you find the radius and center of a circle with the equation #5x^2+5y^2+60x+40y+215=0#?
  • What is the center of the circle with equation #(x + 1)^2 + (y + 3)^2 = 9/4#?
  • What is the center and radius of the circle with equation #x^2 + y^2 - 2x + 14y + 42 = 0#?