\begin{tabular}{l} For the following factored polynomial, find all of the zeros and their multiplicities. \\ \( \qquad f(x)=(x+2)^{8}(x+7)^{7} \) \\ Select the correct answer below: \\ \( x=7 \) with multiplicity 7 , and \( x=-2 \) with multiplicity 8 \\ \( x=-7 \) with multiplicity 8 , and \( x=-2 \) with multiplicity 7 \\ \( x=-7 \) with multiplicity 7 , and \( x=2 \) with multiplicity 8 \\ \( x=7 \) with multiplicity -7 , and \( x=8 \) with multiplicity -2 \\ \( x=-7 \) with multiplicity 7 , and \( x=-2 \) with multiplicity 8 \\ \( x=7 \) with multiplicity 7 , and \( x=2 \) with multiplicity 8 \\ 8 \\ \( x=1 \) \\ \hline\end{tabular}
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Bonus Knowledge
When factoring polynomials like \( f(x) = (x+2)^{8}(x+7)^{7} \), all you really need to do is set each factor equal to zero to find the zeros. For \( (x+2)^{8} = 0 \), we get the zero \( x = -2 \) with a multiplicity of 8 (meaning it touches the x-axis and bounces back). For \( (x+7)^{7} = 0 \), we get the zero \( x = -7 \) with a multiplicity of 7. So the correct answer is \( x = -2 \) with multiplicity 8, and \( x = -7 \) with multiplicity 7. Understanding zeros and their multiplicities can help you sketch the graph of a polynomial. Zeros with even multiplicities merely touch the x-axis, while those with odd multiplicities cross it. This means that in your sketch of \( f(x) \), you'll see the graph touching the x-axis at \( x = -2 \) and crossing it at \( x = -7 \)—a great way to visualize how the polynomial behaves as it moves across different x-values!