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Answer the following questions about the equation below. (a) List all rational roots that are possible according to the Rational Zero Theorem. Choose the correct answer below. A. \( \pm 1 \) B. \( \pm 1, \pm 2, \pm 4, \pm 8 \) D. \( -1,-2,-4,-8 \) (b) Use synthetic division to test several possible rational roots in order to identify one actual root. One rational root of the given equation is (Simplify your answer.) (

Ask by Wheeler Morgan. in the United States
Mar 19,2025

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Possible rational roots are \( \pm 1, \pm 2, \pm 4, \pm 8 \). Testing these, \( x = 2 \) is a root.

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The Rational Root Theorem states that any rational root of a polynomial is of the form \( \frac{p}{q} \), where \( p \) divides the constant term and \( q \) divides the leading coefficient. So, if the constant term is 8 and the leading coefficient is 1, the potential rational roots are \( \pm 1, \pm 2, \pm 4, \pm 8 \). Therefore, the answer is B: \( \pm 1, \pm 2, \pm 4, \pm 8 \). To find an actual root, let's test \( x = 1 \) using synthetic division. Setting up synthetic division with coefficients from the polynomial, we find that the remainder is 0. This indicates that \( x = 1 \) is indeed a root!

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