Question

in equation x^2+2x-3=0 and x^2+3x-k=0 have common root then non zero value of k is

Answer 1

By factorization we get x=1,-3.As roots are common we can take any root of x from 1 st eq to 2 nd eq.When we put x=1,k=4.If we put x=-3 we get k=0.So k=4 is the ans.