Help! Precalc question. So confused!!?
Find the center and radius
x^2+y^2+10x+8y+16=0
I tried completing the square and it don't think it's factorable? Please help? I need the radius and center
Find the center and radius
x^2+y^2+10x+8y+16=0
I tried completing the square and it don't think it's factorable? Please help? I need the radius and center
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Answers & Comments
x^2+y^2+10x+8y+16=0
x^2+10x+y^2+8y = -16
(x+5)^2 - 25 +(y+4)^2 - 16 = -16
(x+5)^2 + (y+4)^2 = 25 = 5^2
center(-5,-4)
radius: r = 5
http://www.wolframalpha.com/input/?i=x^2%2By^2%2B1...