anonymous
  • anonymous
x2 + y2 + 10y + 20 = 0
Mathematics
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anonymous
  • anonymous
x2 + y2 + 10y + 20 = 0
Mathematics
schrodinger
  • schrodinger
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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zzr0ck3r
  • zzr0ck3r
whats the question?
anonymous
  • anonymous
Show that the equation represents a circle by rewriting it in standard form, and find the center and radius of the circle.
anonymous
  • anonymous
complete the square for y.

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anonymous
  • anonymous
x^2 +(y+5)^2= 5
anonymous
  • anonymous
good work matricked, no working whatsoever to show how you got that.
anonymous
  • anonymous
centre (0,-5) and radius sqrt(5)
anonymous
  • anonymous
|dw:1359616706864:dw|
anonymous
  • anonymous
THanks! makes sense now!
anonymous
  • anonymous
compare this with equation of circle (x-a)^2 + (y-b)^2 = r where a,b is the centre and r is the radius
anonymous
  • anonymous
so a = 0 y = -5 r=\[\sqrt{5}\]

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