Question

What is the general form of the equation of a circle with a center at the (4, –2) and a radius of 9?

Answer 1

A(x – 4)^2 + (y – 2)^2 = 81
B (x – 4)^2 + (y + 2^)2 = 81
C(x + 4^)2 + (y – 2)^2 = 81
D(x + 4)^2 + (y + 2)^2 = 81

Answer 2

The general equation of a circle with centre (h,k) and radius r is

\[(x-h)^2+(y-k)^2=r^2\]

Answer 3

Use that here

Answer 4

(x-4)^2+(y+2)^2=9^2

Answer 5

(x^2+8)+(y^2+4)=81

Answer 6

oh, 16?

Answer 7

(x^2+16)+(y^2+4)=81

Answer 8

(x-4)^2+(y+2)^2=9^2 IS RIGHT

Answer 9

9^2=81

Answer 10

ya that's what I did

Answer 11

Now what do I do?

Answer 12

@AravindG

Answer 13

Nothing left !

Answer 14

You got the answer :)

Answer 15

OH, LOL thanks!

Answer 16

lol Option B :)