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Mathematics

OpenStudy (anonymous):

Find the center and radius of the sphere X^2 - 18x + y^2 - 10y + z^2 +14z = -119

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OpenStudy (anonymous):

i got the center points at ( 9, 5, -7).....and kind of unclear about how to go about getting the radius at this point

OpenStudy (anonymous):

U know how to complete the square usually, right? Do it 3 times for x,y,x and the rhs = r^2

OpenStudy (anonymous):

oh is that it?

OpenStudy (anonymous):

Yep.

OpenStudy (anonymous):

lol...okay...thnx so much dude

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OpenStudy (anonymous):

ur welcome.

OpenStudy (anonymous):

nice picture too http://www.wolframalpha.com/input/?i=x^2+-+18x+%2B+y^2+-+10y+%2B+z^2+%2B14z+%3D+-119

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