Question

Find the equation of a circle whose center is at (-2, 5) and whose radius is 7 units.

Answer 1

Answer:

x²+ y²+4x-10y-20= 0

Step-by-step explanation:

just use the standard form of equation.

(x-h)² + (y- k)² = r²

(h,k) is center and r is radius.

(x-(-2))² + (y- 5)² = 7²

(x+2)² + (y- 5)² = 7²

x²+4x+4 + y²-10y+25= 49

x²+ y²+4x-10y= 20

x²+ y²+4x-10y-20= 0