Question

The co-ordinates of a point on the parabola $y^2=8x$ whose focal distance is 4 is

• A. $2,4$
• B. $4,2$
• C. $2,-6$
• D. $4,-2$

Answer 1

The correct option is B $4,2$

$a+x=4\Rightarrow 2+x=4\Rightarrow x=2,y=4or-4$