Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 5 - Polynomials and Polynomial Functions - 5-6 The Fundamental Theorem of Algebra - Practice and Problem-Solving Exercises - Page 324: 52

Answer

$\text{D}$

Work Step by Step

We see that all three terms have a common factor: $x^2$. We can factor this out to get: $$x^4-3x^3+2x^2=x^2(x^2 - 3x + 2)$$ We can further factor the polynomial inside the parentheses. This polynomial is in the form of the quadratic expression $x^2 + bx +c$. We look at the factors of $c$ such that when they are added together, they add up to $b$, meaning, we look at the factors for $2$ that add up to $-3$: For factors $-2$ and $-1$: $b =-2+(-1)= -3$ For factors $2$ and $1$: $b = 2+1=3$ We see that the first set of factors work, so the factored form of the trinomial is: $$x^2 -3x + 2$ = (x - 2)(x - 1)$$ Thus, $x^2(x^2-3x+2)=x^2(x - 2)(x - 1)$. The correct answer is option $D$.
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