A quadratic function is defined by f(x) = -2x^2 + 4x+ 6. a. Find the set of values of x for which f(x) > 8. b. Find the set of values of k for which f(x) = kx has no real roots. c. By considering the identity - -2x^2+ 4x + 6 = A(x + B)? + C, where A, B and C are constants, find the greatest value of f(x).

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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A quadratic function is defined by f(x) = -2x^2 + 4x+ 6. a. Find the set of values of x for which f(x) > 8. b. Find the set of values of k for which f(x) = kx has no real roots. c. By considering the identity - -2x^2+ 4x + 6 = A(x + B)? + C, where A, B and C are constants, find the greatest value of f(x).
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The space given space quadratic space function space is colon
straight f left parenthesis straight x right parenthesis equals negative 2 straight x squared plus 4 straight x plus 6

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