Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 2 - Section 2.4 - Dividing Polynomials; Remainder and Factor Theorems - Exercise Set - Page 365: 75

Answer

When $g\left( x \right)=\left( x-2 \right)$ divides $f\left( x \right)=2{{x}^{2}}-7x+9$, the quotient is $2x-3$ and it leaves the remainder $3$.

Work Step by Step

We put in the value to determine the value of the divisor $g\left( x \right)$: $\begin{align} & 2{{x}^{2}}-7x+9=g\left( x \right).\left( 2x-3 \right)+3 \\ & g\left( x \right).\left( 2x-3 \right)=2{{x}^{2}}-7x+6 \\ & g\left( x \right)=\frac{2{{x}^{2}}-7x+6}{2x-3} \\ & g\left( x \right)=\frac{\left( 2x-3 \right)\left( x-2 \right)}{\left( 2x-3 \right)} \\ \end{align}$ So, $g\left( x \right)=\left( x-2 \right)$ Therefore, the divisor is $g\left( x \right)=x-2$.
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