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Translating to (-1, 2) reduces 9x^2+25y^2+18x-100y-116=0 to an ellipse with a =
A4
B9
C3
D5
Answer & Solution
Correct answer: D. 5
It becomes x'^2/25 + y'^2/9 = 1, so the semi-major axis is a = 5.
Related questions
The foci of the ellipse 9x^2+25y^2+18x-100y-116=0 areIf axes shift h to the right and k up, a fixed point appears movedIf axes are rotated counterclockwise, a fixed point appears rotatedA second-degree equation in x, y, z that is not a cylinder, plane, line or point gives aIn three dimensions the origin moves to (h, k, l). Old z equalsWhen axes are translated, the slope of a given lineWhich expression keeps its value when axes are rotated about the origin?The axes are rotated through any angle. The circle x^2 + y^2 = 9 becomes