Answer: [tex]f(-3)=57[/tex]
Step-by-step explanation:
Given the following function:
[tex]f(x)=6x^2-x[/tex]
To find [tex]f(-3)[/tex] you need to substitute the x value [tex]x=-3[/tex] into the function [tex]f(x)[/tex] given.
Therefore, when the input value (value of the variable "x") is -3, then the ouput value is:
[tex]x=-3\\\\f(-3)=6(-3)^2-(-3)[/tex]
Remember the multplication of signs:
[tex](+)(+)=+\\(-)(-)=+\\(-)(+)=-[/tex]
Then:
[tex]f(-3)=57[/tex]
