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Find the zeroes of the polynomial p(...

Find the zeroes of the polynomial p(y) `=y^3 - 5y^2 - 16y + 80 `. Zero are ` alpha ,- alpha and beta `

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CPC CAMBRIDGE PUBLICATION-CPC MODEL QUESTION PAPER -6-QUESTION
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  3. Find the zeroes of the polynomial p(y) =y^3 - 5y^2 - 16y + 80 . ...

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