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Correct option is C
We have 6x2−xy−12y2=0 or (2x−3y)(3x+4y)=0-----(1) and 15x2+14xy−8y2=0 or (5x−2y)(3x+4y)=0---(2) Equation of the line common to (1) and (2) is 3x+4y=0---(3)Equation of any line parallel to (3) is 3x+4y=kSince its distance from (3) is 7 , we have c2-c1a2+b2=k32+42=7 or k=±35Talk to our academic expert!
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