SOLUTION: Please help me out! Let f(x)=x to the second power -16 and g(x)=4-x. Find (fg)(-3). (fg)(-3)=

Question 419704: Please help me out!
Let f(x)=x to the second power -16 and g(x)=4-x.
Find (fg)(-3).
(fg)(-3)=
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
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)

RELATED QUESTIONS
Please help me! These are two separate problems. Let f(x)=x+4 and g(x)=x^2 -4.... (answered by ewatrrr)

Please help me to find the following functions. Let f(x)=x=4 and g(x) =x^2+8x-3 a.... (answered by solver91311)

let f(x)^2-3 and g(x)=4-x find... (answered by funmath)

please help!! Find the functions f + g, f − g, fg, and f/g. f(x) = (sqrt(x -... (answered by josgarithmetic)

Please help me solve this function: (fg)(x) f(x) = 1/x, g(x) =... (answered by Fombitz)

Let f(x) = 5x^2 +3 and g(x) = 2x^2 + 3x -6. Find (fg)(-1). (answered by ewatrrr,stanbon)

Let f(x) = 5x^2 +3 and g(x) = 2x^2 + 3x -6. Find (fg)(-1). (answered by ewatrrr)

If f(x)=(9x-9) and g(x)=(x-4), find (fg)(x).... (answered by algebrahouse.com)

this is very difficult for me, can you help? Let f(x)=5x-6 and g(x)=x^2-8x+16. find the... (answered by stanbon)