Answer
2 unqiue real solutions
Work Step by Step
Quadratic Equation : $2x^2-x-1=0$
Use discriminant to determine the number of real solutions.
Discriminant = $(-1)^2-4(2)(-1)=9$
which is greater than zero, hence there are 2 unique real solutions.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - 1.4 - Quadratic Equations and Applications - 1.4 Exercises - Page 110: 63
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