https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/hs-geo-circle-expanded-equation/v/completing-the-square-to-write-equation-in-standard-form-of-a-circle 2021-04-21T12:01:46Z Features of a circle from its expanded equation Sal finds the center and the radius of a circle whose equation is x^2+y^2+4x-4y-17=0, and then he graphs the circle. Sal Khan video https://cdn.kastatic.org/googleusercontent/Oembzj1tMOVAtpDcNkuVVwyscF4ptsiqRKaW9ns45uBsAFn-r5-Trm7evKb0P-TRqRrjiFNGW55uKvQm5Rlzh049 Features of a circle from its expanded equation Sal finds the center and the radius of a circle whose equation is x^2+y^2+4x-4y-17=0, and then he graphs the circle. https://cdn.kastatic.org/ka-youtube-converted/XyDMsotfJhE.mp4/XyDMsotfJhE.mp4 260 Expanded equation of a circle https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/hs-geo-circle-expanded-equation/e/equation_of_a_circle_2 2026-03-19T10:29:23.537306434Z Features of a circle from its expanded equation Find the center and radius of a circle given the equation in expanded form. Sid Patel exercise https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/hs-geo-circle-expanded-equation/e/graphing_circles_2 2026-03-19T10:29:23.537306434Z Graph a circle from its expanded equation Given the expanded equation of a circle, graph the circle. For example, graph the circle whose equation is x²+y²+4x+8y+16=0. Sid Patel exercise https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/hs-geo-circle-expanded-equation/a/circle-equation-review 2022-09-10T02:03:40.164764806Z Circle equation review Review the standard and expanded forms of circle equations, and solve problems concerning them. article