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if one of the straight lines given by ax^2+2hxy+by^2=0 coincide with one of those given by a`x^2+2h`xy+b`y^2=0 and the other lines represented by them be perpendicular, prove that ha`b`/b`-a` = h`ab/b-a = (√-aa`bb`)/2.

KAUSTUBH , 7 Years ago
Grade 11
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