Question

f(x)=-15x+1
g(x)=-15x^2-20x-5
find (gof)(-3)

Answer 1

woah that looks confuzing, okay:
f(x)=15x+1
g(x)=-15x\[^{2}\]-20x-5
find (g o f)(3)

Answer 2

*-3, sorry

Answer 3

f(x)=-15x+1
g(x)=-15x^2-20x-5

f(-3) = -15(-3) + 1 = 45 + 1 = 46

(g o f)(-3) = g(f(-3)) = g(46)

g(46) = -15(46)^2 - 20(46) - 5 = -31740 - 920 - 5 = -32665

Answer 4

That should be the correct answer

Answer 5

dude you're awesome. i remember that now. so you solve f(-3) and then put it into g
?

Answer 6

The general formula is:

(f o g)(x) = f(g(x))

But in this case we have: (g o f)(-x), so we write:

(g o f)(-x) = g(f(-x)), then solve.

Answer 7

sweethanks !!! could you help me with one more problem?

Answer 8

Post it