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Which number is a root of f(x) = x7 + 2x6 – 18x5 – 36x4 + 81x3 + 162x2 with multiplicity 1?
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3 -2 -3 0
0 has multiplicity 2
-2 is a zero with multiplicity 1
factors as \[x^2(x+2)(x^2-9)^2\]
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