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If '3' is a zero of the polynomial p(x)=...

If '3' is a zero of the polynomial `p(x)=2x^3-kx+3`, then find the value of k:

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`P(x)=2x^3-kx+3`
`x=3`
`P(3)=2(3)^2-k*3+3=0`
`54-3k+3=0`
`3k=57`
`k=19`.
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