I need to let the function f be defined by y=f(x), where x and f(x) are real numbers. Will you please help me find f(k2-1).  f(x)= -x2-3x+1

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter8: Introduction To Functions
Section8.8: Linear And Quadratic Functions
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I need to let the function f be defined by y=f(x), where x and f(x) are real numbers. Will you please help me find f(k2-1). 

f(x)= -x2-3x+1

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Step 1

We have to plug x=k2-1 in the given equation.

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