Concept explainers
To find:the rational and irrational zeros of the polynomial.
Answer to Problem 81E
the zeros of the polynomial is
Explanation of Solution
Given information:
the polynomial is
concept used:
rational zero theorem,
Calculation:
The constant term is
The factors of
Thus, the possible rational zeros of
the possible zeros of
Using synthetic division,
4 | 0 | -21 | 0 | 5 | |
2 | 1 | -10 | -5 | ||
4 | 2 | -20 | -10 | 0 |
- | 4 | 0 | -21 | 0 | 5 |
-2 | 1 | -10 | -5 | ||
4 | -2 | -20 | -10 | 0 |
Two zeros -
Factors of the polynomial ,
For other two zeros use quadratic formula,
The zeros of the polynomial is
Chapter 3 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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