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anonymous
 3 years ago
x2 + y2 + 10y + 20 = 0
anonymous
 3 years ago
x2 + y2 + 10y + 20 = 0

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Show that the equation represents a circle by rewriting it in standard form, and find the center and radius of the circle.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0complete the square for y.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0good work matricked, no working whatsoever to show how you got that.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0centre (0,5) and radius sqrt(5)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1359616706864:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0THanks! makes sense now!

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0compare this with equation of circle (xa)^2 + (yb)^2 = r where a,b is the centre and r is the radius

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so a = 0 y = 5 r=\[\sqrt{5}\]
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