For this case we have the following function:
[tex]h (n) = n ^ 2-4n[/tex]
We must find the value of the function when [tex]n = -3[/tex].
Substituting we have:
[tex]h (-3) = (- 3) ^ 2-4 (-3)[/tex]
We must bear in mind that the law of multiplication signs complies:
[tex]- * - = +[/tex]
So:
[tex]h (-3) = 9 + 12\\h (-3) = 21[/tex]
Answer:
[tex]h (-3) = 21[/tex]
