Question

the range of real number k for which the equation X^2-3x+k has 2distint roots is[-1,2]​

Answer 1

Step-by-step explanation:

taking the root -1, we get,

1 + 3 + k = 0 => k = -4

and, taking the other root 2, we get:

4 - 6 + k = 0 => k = 2

therefore, k= { -4, 2 }

where, Domain of k is -4

and Range of k is 2

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