Find The Radius of The Sphere ?

The radius of the sphere
3x2+3y2 +3z2 – 8x + 4y + 8z -15 = 0 is

  1. 2
  2. 3
  3. 4
  4. 5
Anurag Mishra Professor Asked on 30th September 2015 in Maths.
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