Answer
See below
Work Step by Step
The discriminant is $b^2-4ac$.
Substitute $a=81\\b=18\\c=1$ into this:
$(18)^2-4(81)(1)=0$
The discriminant is zero; thus the equation has only one real solution.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 5 Polynomials and Polynomial Functions - 5.6 Find Rational Zeroes - 5.6 Exercises - Mixed Review - Page 377: 66
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