x2+y2-4x+18y=-69

x2+y2-4x+18y=-69 write the equation of the circle in standard form. find the center, radius, intercepts, annd graph the circle.
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1 Answer

In x2+y2-4x+18y=-69 we need to complete the squares for x and y:

x2-4x+4+y2+18y+81=-69+4+81,

(x-2)2+(y+9)2=16 is the standard form centre (2,-9) and radius 4.

by Top Rated User (1.2m points)

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