Intermediate Algebra
19th Edition
ISBN:9780998625720
Author:Lynn Marecek
Publisher:Lynn Marecek
Chapter9: Quadratic Equations And Functions
Section9.8: Solve Quadratic Inequalities
Problem 9.128TI: Solve x28x+120 graphically and (b) write the solution in interval notation.
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Solve −4cos2(x)+3cos(x)+1=0

The smallest non-negative solution is: 

The next smallest non-negative solution is: 

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