Show that 3 is a zero of the polynomial x^3 +x^2 -17x + 15.
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Show that 3 is a zero of the polynomial x^3 +x^2 -17x + 15.
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x^3 +x^2 -17x + 15
subtituting 3 in x
3^3 + 3^2 - 17(3) + 15
27 + 9 - 51 + 15
51 - 51
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