If the center of the sphere \[a{{x}^{2}}+b{{y}^{2}}+c{{z}^{2}}-2x+4y+2z-3=0\]is \[(1/2,-1,-1/2)\], what is the value of b ?

If the center of the sphere \[a{{x}^{2}}+b{{y}^{2}}+c{{z}^{2}}-2x+4y+2

1.	If the center of the sphere \[a{{x}^{2}}+b{{y}^{2}}+c{{z}^{2}}-2x+4y+2z-3=0\]is \[(1/2,-1,-1/2)\], what is the value of b ?
A.	1
B.	-1
C.	2
D.	-2
Answer» D. -2

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If the center of the sphere \[a{{x}^{2}}+b{{y}^{2}}+c{{z}^{2}}-2x+4y+2z-3=0\]is \[(1/2,-1,-1/2)\], what is the value of b ?

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