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If the remainder on division of x^3 + 2x...

If the remainder on division of `x^3 + 2x^2 + kx + 3` by `x - 3` is 21, then find the quotient and the value of k. Hence, find the zeroes of the cubic polynomial `x^3 + 2x^2 + kx - 18.`

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The correct Answer is:
`k=-9`, Quotient `=x^(2) + 5x +6`
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