Answer :
When evaluating the function for x = -1 we get that the output equals 7
Explanation:
In this exercise, we need to evaluate:
[tex]-3x^3-4x \ for \ x = -1[/tex]
So let's call this a function [tex]f(x)[/tex]. So:
[tex]f(x)=-3x^3-4x[/tex]
To evaluate [tex]x=-1[/tex] we need to substitute this value into the function, so:
[tex]f(-1)=-3(-1)^3-4(-1) \\ \\ Solving: \\ \\ f(-1)=-3(-1)+4 \\ \\ Because: \\ \\ (-1)^3=-1 \ and \ -4(-1)=4 \\ \\ f(-1)=3+4 \\ \\ \boxed{f(-1)=7}[/tex]
Finally, when evaluating the function for x = -1 we get that the output equals 7
Learn more:
Roots of a polynomial function: https://brainly.com/question/1831722
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