Question

If f(n) = n2 - n, then f(-4) is _____.
-20
20
12
-12

Answer 1

\[f(n) = n^{2} -n \Rightarrrow f(-4) = (-4)^{2} -(-4) = 16+4 = 20\]

Answer 2

er....ignore that right arrrow thing....too many rrrs lol

Answer 3

lol

Answer 4

rightarrow needs lower case then it will work

Answer 5

thanks