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Mathematics 20 Online
OpenStudy (anonymous):

State the equation of this circle: Centre (-1, -1) through the point (4,0)?

OpenStudy (anonymous):

(x+1)^2 + (y+1)^2 = 25

OpenStudy (anonymous):

radius is 5 and centre is (-1,-1). so just sub into the general equation

OpenStudy (anonymous):

How did you know that the equation equalled to 25? As it doesn't say what the radius is in the question?:p

OpenStudy (anonymous):

Is the radius just the distance between the two points of x?

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