Question
Mathematics Question on Straight lines
The equation 8x2+ 12y2– 4x + 4y – 1 = 0 represents
A
(A) an ellipse
B
(B) a hyperbola
C
(C) a parabola
D
(D) a circle
Answer
(A) an ellipse
Explanation
Solution
Explanation:
ax2+by2+2hxy+2gx+2fy+c=0represents ellipse if h2−ab<03x2+12y2−4x+4y−1=0h=0,a=3,b=12h2−ab<0