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The value(s) of k which the equation x^2...

The value(s) of `k` which the equation `x^2-k x-21=0 a n d x^2-3kx+35=0` has a common root, may be: `(a) +-1` (b) `+-2` (c) ` +-4` (d) ` No of these `

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Knowledge Check

  • The values of k for which the equations x^2-kx-21=0 and x^2-3kx+35=0 will have a common roots are :

    A
    `k=+-4`
    B
    `k=+-1`
    C
    `k=+-3`
    D
    k=0

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