What is the general form of the equation of a circle with its center at (-2, 1) and passing through (-4, 1)?

A. x2 + y2 − 4x + 2y + 1 = 0

B. x2 + y2 + 4x − 2y + 1 = 0

C x2 + y2 + 4x − 2y + 9 = 0

D. x2 − y2 + 2x + y + 1 = 0

Question

What is the general form of the equation of a circle with its center at (-2, 1) and passing through (-4, 1)? 

A. x2 + y2 − 4x + 2y + 1 = 0 

B.  x2 + y2 + 4x − 2y + 1 = 0 

C x2 + y2 + 4x − 2y + 9 = 0

D. x2 − y2 + 2x + y + 1 = 0

caseysorensen · Answer

@Qwertty123 @Roxy.girl @InstagramModel  @soprano.h.d0816

caseysorensen · Answer

plz help I don't understand this question

hyuna301 · Answer

u have 2 ways to do 1st is the conceptual and the 2nd one is to check from the given options

hyuna301 · Answer

i will use the 2nd method .. if the circle passes through the pt. ( -4 , 1 ) then one of the equation in the given option will definately satisfies with it
so just put x = -4 and y = 1 in the give eq. then check whether the outcome is 0 or not
if it is zero then that eq. is the given circle's eq.

hyuna301 · Answer

if u need conceptual explanation than i can also explain that one..

hyuna301 · Answer

and the answer is A

caseysorensen · Answer

thank you