wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The equation of the directrix of the parabola y2+4y+4x+2=0 is

A
x=1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
x=1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
x=32
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
x=32
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D x=32
y2+4y+4x+2=0
(y+2)2+4x2=0
(y+2)2=4(x12)
Replace y+2=Y,x12=X
We have, Y2=4X
This is a parabola with directrix at X =1
x12=1
x=32

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Defining Conics
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon