Question

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The equation 2y? - xy - x? +6x - 8 = 0 represents
(a) A pair of straight lines (b)
A circle
One of the lines represented by the equation x2 +60 = 0) is
(c) An ellips​

Answer 1

Step-by-step explanation:

1. If the slope of one of lines ax2 + 2hxy + by2 = 0 is thrice that the other, then is

A:

2. If the lines ax2 + 2hxy + by2 = 0 are equally inclined with coordinate axes, then

A: h = 0, ab < 0

3. The equation of the pair of lines passing through (1, 2) and parallel to the coordinate axes is

A: xy - 2x - y + 2 = 0

4. x2 + k1y2 + 2k2y - a2 = 0 represents a pair of perpendicular lines if

A: k1 = -1; k2 = -a