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Straight Lines

PRACTICE
100:00+4 0IPMAT Indore 2021Numeric Answer
If one of the lines given by the equation 2x2+axy+3y2=02x^2 + axy + 3y^2 = 0 coincides with one of those given by 2x2+bxy−3y2=02x^2 + bxy - 3y^2 = 0 and the other lines represented by them are perpendicular then a2+b2=a^2+b^2 =
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