Question

Given that f(x) =x^2-2x and g(x)=x + 10 find

A.) f+g =
B.) f-g=
C.) fg=
D.) f/g=

Answer 1

1. x^2 -2x + x+10 = x^2-x-10

2. x^2-3x -10

3. 11x^ 3 −22x^ 2

4. x-2/11

Explanation:

f(x) x^2 -2x and g|(X) x + 10

1) f+g

f+g is f(x) + g(x) = x^2 -2x + x + 10 = x^2 -x -10 and you could write highest degree first if not already shown = x^2 -2x + x+10

2) f-g

f-g = f(x) = g(x) = x^2-2x - x+10 = x^2-3x -10

3) fg

fg = f (x) x g(x) = (x^2-2x) x (x+10) = 11x^ 3 −22x^ 2

4) f/g

f/g = f(x) / g(x) = x^2- 2x/11x = x-2/11