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