Question

pLEASE PLEASE PLEASE CHECK TO SEE IF IM CORRECT
14X^2-6X+2
14(3)^2-6(3)+2.
NOW iM STUCK i THINK THE ANSWER IS 110

Answer 1

(fog) (3)

Answer 2

On the first term, you first you have to do the power before the multiplication so:
14(9)-18+2

Answer 3

what is f and g to begin with?

Answer 4

without knowing what f and g is, there is no way to tell if youve done the question correctly

Answer 5

f(x)=2x
g(x)= 7x^2-3+1

Answer 6

fog means that we need to insert g into the x parts of f

Answer 7

f(x)=2x

f(g) = 2g ; and since g(x)= 7x^2-3+1

fog = 2(7x^2-3+1)

i think your missing an x in the g part

Answer 8

yes 7x^2+3x+1 sorry

Answer 9

lets see if it goes right there
v
fog = 2(7x^2-3x+1)

and then when x=3


fog = 2(7(3)^2-3(3)+1)
fog = 2(7(9)-9+1)
fog = 2(63-8)
fog = 2(55) = 110 yes

Answer 10

so now we are at 14x^2-6x+2 right

Answer 11

you dont "need" to work the 2 thru ... it can wait till afterwards if it makes life easier

Answer 12

omg I got it right lol, please dont go now I have to do (gof) (x)

Answer 13

is f and g the same rules as above?

Answer 14

yes

Answer 15

lets put f into g then

g(x)=7x^2-3x+1

g(f)=7f^2-3f+1

and f=2x ....

g(f)=7(2x)^2-3(2x)+1

Answer 16

so now it would be
7(f(x))^2-3f(x)+1
7(2x)^2-3(2x)+1
7 (2x)(2x)-3(2x)+1
28x^2-6x+1

Answer 17

i like it

Answer 18

yeah next week is my final for this class and then I will have my aa

Answer 19

good luck :)

Answer 20

now I ahve to do (gof)(-4)

Answer 21

amistre64 this is the one that I get lost on because of the (-4)

28x^2-6x+1
28(-4)^2-6(-4)+1
then I am lost
would it be 448-24+1=425