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If x^2-2p x y-y^2=0 and x^2-2q x y-y^2=0...

If `x^2-2p x y-y^2=0` and `x^2-2q x y-y^2=0` bisect angles between each other, then find the condition.

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CENGAGE ENGLISH-STRAIGHT LINES-All Questions
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  4. Find the value of a for which the lines represented by a x^2+5x y+2y^2...

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