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Let P Q R be a right-angled isosceles tr...

Let `P Q R` be a right-angled isosceles triangle, right angled at `P(2,1)dot` If the equation of the line `Q R` is `2x+y=3` , then the equation representing the pair of lines `P Q` and `P R` is `3x^2-3y^2+8x y+20 x+10 y+25=0` `3x^2-3y^2+8x y-20 x-10 y+25=0` `3x^2-3y^2+8x y+10 x+15 y+20=0` `3x^2-3y^2-8x y-15 y-20=0`

A

`3x^(2)-3y^(2)+8xy+20x+10y+25=0`

B

`3x^(2)-3y^(2)+8xy-20x-10y+25=0`

C

`3x^(2)-3y^(2)+8xy+10x+15y+20=0`

D

`3x^(2)-3y^(2)-8xy-15y-20=0`

Text Solution

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The correct Answer is:
B
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DISHA PUBLICATION-STRAIGHT LINES AND PAIR OF STRAIGHT LINES-EXERCISE 2: CONCEPT APPLICATOR
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