precalc!!!!!
posted by L.Bianchessi .
Let f(x)=3x4x^2
Find f o f o f
So...
F(f(x))
I got a really big answer..... I think I might have done something wrong when doing the distributing algebraic work.

f(x) =3x4x^2
f(f(x))=3(3x4x^2)4(3x4x^2)^2
factor out (3x4x^2)
=(3x4x^2)(34(3x4x^2)
=(3x4x^2)(312x+16x^2)
f(f(f(x))=3(3x4x^2)(312x+16x^2)4(3x4x^2)(312x+16x^2)^2
factor out (3x4x^2)(312x+16x^2)
f(f(f(x))=(3x4x^2)(312x+16x^2)(34(3x4x^2)(312x+16x^2))
=(3x4x^2)(312x+16x^2)(34(9x36x^2+48x^312x^2+48x^364x^4)
simplifying
=(3x4x^2)(312x+16x^2)(34(9x48x^2+96x^364x^4)
=(3x4x^2)(312x+16x^2)(336x+192x^2+384x^3256x^4)
A really big answer
Respond to this Question
Similar Questions

Algebra
 ok... we keep getting this one wrong: Solve the following equation for x. Write your answer as a fraction in simplest form. 6(x5)=2x86(3x5) What is it you don't understand about this? 
Algebra
Hi! I was wondering if anyone might be willing to check my answers for these... I have a suspiscion they are wrong, but I don't have any correct answers to compare them against. If I got them wrong, would you mind giving a brief explanation? 
Math
I need someone to show me how to work these two problems out. 30. find the hypotenuse of a right triangle whose sides measure 9 and 12: i came up with the answer 15 but i honestly forgot how i got this answer please let me know what … 
introductory algebra
I had these problems on my test and for some reason got them wrong. Here are the problems: Solve: xy=9 x+y=1 The test states that the answer is (5,4) I've checked ,y work and used substitution to solve this and still get x=4, y=5. … 
Calc I
Find the range of y = (3x1)/(2x^2 + x  6) I was going to take the derivative of the numerator and denomenator and then use the quotent rule to find the derivative of the function and find the critical values but I ran into the imaginary … 
precalc!!!!!
Let f(x)=3x4x^2 Find f o f o f So... F(f(x)) I got a really big answer..... I think I might have done something wrong when doing the distributing algebraic work. 
Calculus
Which statement is NOT true of the graph f(x)=(x+1)(x3)^2? 
math work for workeys
Ok so I have an example and I used it for my work. First I'll show the example. Multiply a mixed number with a whole number. 4 times 2 and 1/8 . You multiply 4 times 2 and 4 times 1/8. Get 8 + 4/8. Simplified and got 8 and 1/2. The … 
Calc/Precalc
Find the derivatives of 1. ln[(2x^3⋅2e^x)] 2. xy = cot(xy) 3. y = cos(x^3 + 27) I don't really know where to start with these. The answer is (3+x)/(x) for the first, y/x for the second, and 35. 3x^2 sin(x^3 + 27) but I have … 
Math
6 cd+2b+9(cd+b/3)=A(3cd+b) I'm really sorry this question seems really hard to me. But what I got as an answer is 6, ohh and I have another question. Can you use the distributive property on this problem?