To find: The discriminant of
Answer to Problem 29SGA
No positive rational roots
1 negative rational root at
Explanation of Solution
Given information:
Calculation:
Possible rational roots are every factor of:
Descartes tells us there is 1 positive root and either 1 or 3 negative roots.
r | 2 3 -6 -11 -3 | |
1 | 2 5 -1 -12 | -15 |
1/2 | 2 4 -4 -13 | -19/2 |
3/2 | 2 6 -3 -31/2 | -105/4 |
So there are no positive rational roots.
r | 2 3 -6 -11 -3 | |
-1 | 2 1-7 -4 | 1 |
-3 | 2 -3 3 -20 | 57 |
-1/2 | 2 2-7-15/2 | 3/4 |
-3/2 | 2 0 -6 -2 | 0 |
There is 1 negative rational root at
Chapter 4 Solutions
Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
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