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Find the Center and Radius of the Sphere 2x2+2y2+2z2x+yz=92 x ^ { 2 } + 2 y ^ { 2 } + 2 z ^ { 2 } - x + y - z = 9

Question 212

Multiple Choice

Find the center and radius of the sphere.
- 2x2+2y2+2z2x+yz=92 x ^ { 2 } + 2 y ^ { 2 } + 2 z ^ { 2 } - x + y - z = 9


A) (14,14,14) ,a=758\left( - \frac { 1 } { 4 } , \frac { 1 } { 4 } , - \frac { 1 } { 4 } \right) , \mathrm { a } = \frac { 75 } { 8 }
B) (14,14,14) ,a=564\left( \frac { 1 } { 4 } , - \frac { 1 } { 4 } , \frac { 1 } { 4 } \right) , \mathrm { a } = \frac { 5 \sqrt { 6 } } { 4 }
C) (14,14,14) ,a=562\left( \frac { 1 } { 4 } , - \frac { 1 } { 4 } , \frac { 1 } { 4 } \right) , \mathrm { a } = \frac { 5 \sqrt { 6 } } { 2 }
D) (14,14,14) ,a=534\left( \frac { 1 } { 4 } , - \frac { 1 } { 4 } , \frac { 1 } { 4 } \right) , \mathrm { a } = \frac { 5 \sqrt { 3 } } { 4 }

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