Question

f(x) = -3x -7, g(x) = -8x^2 -7x +8
find (F o G)(-7)

Answer 1

@zepdrix I should be able to get this one without much trouble haha

Answer 2

I think I need to rewrite it as f(g(-7)) first

Answer 3

and then is it -3(-7) -7 = 14

Answer 4

g(-7) is what

Answer 5

g(x), x=-7

Answer 6

yes what is g(x) when x = -7

Answer 7

g(x) = -8x^2 -7x +8

g(-7) = -8(-7)^2 -7(-7) +8

g(-7) = ???

Answer 8

oh, I plug in the f(x)?

Answer 9

what answer do you get for g(-7)

Answer 10

-335

Answer 11

that's the input for f(x)

this is because (F o G)(-7) is really f(g(-7))

Answer 12

f(g(-7)) = f(-335) = ???

Answer 13

998!

Answer 14

you got it

Answer 15

thanks you!

Answer 16

yw