Question 419704
Let f(x)=x to the second power -16 and g(x)=4-x.
Find (fg)(-3).


f(x) = x^2 - 16
g(x) = 4-x


fg(x) = f(x) * g(x)


that becomes fg(x) = (x^2 - 16) * (4-x)


fg(-3) becomes ((-3)^2 - 16) * (4 - (-3))


you simply replace x with (-3) in the equation.


solve that to get fg(-3) = (-7) * (7) = (-49)