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Mathematics 8 Online
OpenStudy (anonymous):

what is the center and radius of the circle with the given equation x^2+y^2+10x-6y=-9

OpenStudy (jdoe0001):

do you know what a "perfect square trinomial" is?

OpenStudy (anonymous):

no, i do not. would you mind explaining it to me?

OpenStudy (solomonzelman):

rearrange, add 9 to both sides, and then add 25 to both sides.

OpenStudy (solomonzelman):

I mean then factor into perf. squares.

OpenStudy (anonymous):

how would i do that all i got was 9+ x^2+y^2+10x-6y

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