Question

What is the general form of the equation of a circle with center at (a, b) and radius of length m?
A) x2 + y2 − 2ax − 2by + (a2 + b2 − m2) = 0
B) x2 + y2 + 2ax + 2by + (a2 + b2 − m2) = 0
C) x2 + y2 − 2ax − 2by + (a + b − m2) = 0
D) x2 + y2 + 2ax + 2by + a2 + b2 = -m2

Answer 1

\[
x^2 + y^2 − 2ax − 2by + (a^2 + b^2 − m^2) = 0 \\
x^2 - 2 ax + a^2 + y^2- 2 by +b^2 = m^2\\
(x-a)^2 + (y-b)^2=m^2

\]
Is this the right equation?

Answer 2

IS IT B?

Answer 3

No, try again

Answer 4

d?

Answer 5

Compare my first line to the choices

Answer 6

a?

Answer 7

Yes

Answer 8

thank you