JEE MATHEMATICS MCQ: PAIR OF STRAIGHT LINES

1 Easy

1 of 1

Application +4 | -1

a x^2+2 h x y+b y^2+2 g x+2 f y+c=0

represents parallel straight lines, then

View answer and explanation

Correct option: A

h f=b g

Option A (

h f=b g

) is correct because for parallel lines, the condition

bg^2 = af^2

must hold, which simplifies to

hf = bg

when

h^2 = ab

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