ehamer Group Title x2 + y2 + 10y + 20 = 0 one year ago one year ago

1. zzr0ck3r Group Title

whats the question?

2. ehamer Group Title

Show that the equation represents a circle by rewriting it in standard form, and find the center and radius of the circle.

3. Azteck Group Title

complete the square for y.

4. matricked Group Title

x^2 +(y+5)^2= 5

5. Azteck Group Title

good work matricked, no working whatsoever to show how you got that.

6. matricked Group Title

7. manishsatywali Group Title

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8. ehamer Group Title

THanks! makes sense now!

9. manishsatywali Group Title

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 Group Title

so a = 0 y = -5 r=$\sqrt{5}$