Question
Question: Equation of the parabola, whose vertex is ( –1, –2), axis is vertical and which passes through the p...
Equation of the parabola, whose vertex is ( –1, –2), axis is vertical and which passes through the point (3, 6), is
A
x2 + 4x + 28 y – 136 = 0
B
x2 + 2x – 2y – 3 = 0
C
y2 + 4y – 16 x –12 = 0
D
None of these
Answer
x2 + 2x – 2y – 3 = 0
Explanation
Solution
Equation of the parabola should be
(x + 1)2 = 4a ( y +2).
It passes through (3, 6), so that a =1/2