3. Do the equations - 2x - 3y = 1 and 4x + by - 2 represent a pair of coincident lines? fustaty your
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1. Does there exist a quadratic equation whose coefficients are rational but both of its roots are
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(3). 2x- 3x = 1, 4x+ by-2
2x-3x= 1...........(1)
4x+by-2...,.......(2)
Adding equation (1)& (2)
2x-3x=1
4x+by-2
_________
6x +3xy=-3
9xy+-3
-12
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