Question

Given the functions, f(x) = x - 8 and g(x) = x2 + x - 1, perform the indicated operation. When applicable, state the domain restriction.
(fg)(x)

x3 - 7x2 - 9x + 8
x3 - 9x2 - 9x + 8
x3 - 9x2 - 9x - 8
x3 - 7x2 - 9x - 8

Answer 1

I have no idea how to figure this thing out...

Answer 2

Try Google! XD

Answer 3

I tried but nothing came up

Answer 4

It's asking you to multiply the functions -

\(\large (x-8)*(x^2+x-1) \)

Answer 5

$$\huge (fg)(x)=f(x)*g(x)$$

Answer 6

Whenever I multiply I don't get any of my answer options

Answer 7

\[(x-8) \times (x^2+x-1)=x^3+x^2-x-8x^2-8x+8=?\]

Answer 8

im not sure where you're getting all the extra x's from

Answer 9

I can see the x ubed and the x squared

Answer 10

$$a(b+c+d)=ab+ac+ad$$

Answer 11

Let a = x-8

Answer 12

Then use$$ (b+c)a=ba+ca$$