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Question

Find the equation of the bisectors of the angle between the lines represented by 3x25xy+4y2=0


A

5x22xy+5y2=0

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B

5x22xy+5y2=0

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C

5x22xy5y2=0

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D

x22xyy2=0

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Solution

The correct option is C

5x22xy5y2=0


Given equation is

3x25xy+4y2=0

Comparing this equation of with standard pair of straight lines passing through origin ax2+2hxy+by2=0

We have a = 3, b = 4, h=52

Now the equation of the bisector of the angle between the pair of lines (1)

x2y2ab=xyh

Substituting the value of a,b and h

x2y234=xy52;

x2y21=2xy5or5x25y2=2xy

5x22xy5y2=0


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