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ehamer

  • 3 years ago

x2 + y2 + 10y + 20 = 0

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  1. zzr0ck3r
    • 3 years ago
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    whats the question?

  2. ehamer
    • 3 years ago
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    Show that the equation represents a circle by rewriting it in standard form, and find the center and radius of the circle.

  3. Azteck
    • 3 years ago
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    complete the square for y.

  4. matricked
    • 3 years ago
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    x^2 +(y+5)^2= 5

  5. Azteck
    • 3 years ago
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    good work matricked, no working whatsoever to show how you got that.

  6. matricked
    • 3 years ago
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    centre (0,-5) and radius sqrt(5)

  7. manishsatywali
    • 3 years ago
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    |dw:1359616706864:dw|

  8. ehamer
    • 3 years ago
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    THanks! makes sense now!

  9. manishsatywali
    • 3 years ago
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    compare this with equation of circle (x-a)^2 + (y-b)^2 = r where a,b is the centre and r is the radius

  10. manishsatywali
    • 3 years ago
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    so a = 0 y = -5 r=\[\sqrt{5}\]

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