Question

What is the general form of the equation for the given circle?

x2 + y2 - 8x - 8y + 23 = 0

x2 + y2 - 8x - 8y + 32 = 0

x2 + y2 - 4x - 4y + 23 = 0

x2 + y2 + 4x + 4y + 9 = 0

Answer 1

wow this is hard. what grade u in?

Answer 2

11 th

Answer 3

you mean to say which one of these equation represents a circle right ?

Answer 4

yea

Answer 5

okay to solve this problem we're going to use the standard form \[(y-y_0)^2+(x-x_0)^2=r^2\]

Answer 6

ok so how do you do it?

Answer 7

we're going to try to write your equations in this form

Answer 8

if we develop the standard form we obtain
\[y^2-2y_0+{y_0}^2+x^2-2x_0+{x_0}^2=r^2\]

Answer 9

ok what does that mean im very confused srry

Answer 10

can you figure out which one is closed to be like this form

Answer 11

ok thx

Answer 12

this is part of the question

Answer 13

what about this part

Answer 14

I still don't understand :)