1.

Find lambda in order that the equation x^(2)+lambda xy+y^(2)-5x=7y+6=0 may represents two straight line. Write down the equation to the lines parallel to these and passing through (1,2).

Answer»


Answer :`lambda= (5)/(2)` or `(10)/(3)` : (2x+y-4)(X + 2y -5) = 0 or (3X + y-5) (x+3y-7) = 0


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