The equation of an ellipse whose eccentricity is 1/2 and the vertices

1.	The equation of an ellipse whose eccentricity is 1/2 and the vertices are (4, 0) and (10, 0) is
A.	\[3{{x}^{2}}+4{{y}^{2}}-42x+120=0\]
B.	\[3{{x}^{2}}+4{{y}^{2}}+42x+120=0\]
C.	\[3{{x}^{2}}+4{{y}^{2}}+42x-120=0\]
D.	\[3{{x}^{2}}+4{{y}^{2}}-42x-120=0\]
Answer» B. \[3{{x}^{2}}+4{{y}^{2}}+42x+120=0\]

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The equation of an ellipse whose eccentricity is 1/2 and the vertices are (4, 0) and (10, 0) is

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