JEE MATHEMATICS MCQ: PAIR OF STRAIGHT LINES

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Which of the following pairs of straight lines intersects at right angles?

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Correct option: A

2 x^2=y(x+2 y)

Option A (

2x^2 = y(x+2y)

) is correct because the sum of the coefficients of

x^2

and

y^2

is zero, which is the condition for lines intersecting at right angles.

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