Q.

The rectangle formed by the pair of lines  2hxy+2gx+2fy+c=0 with the coordinate axes has the area equal to

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a

|fg|h2

b

|gh|f2

c

|hf|g2

d

|fg|h

answer is A.

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Detailed Solution

Δ=0 and apply |c|2h2−ab
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