Question

Suppose that the functions f and g are defined for all real numbers x as follows.

Answer 1

Answer:

(f+g)(x)=5x-4

(f*g)(x)=(4x^2-19x-5)

(f-g)(3)=(-15)

Step-by-step explanation:

(f+g)(x)=(x-5)+(4x+1)=(5x-4)

(f*g)(x)=(x-5)(4x-1)=(4x^2-19x-5)

(f-g)(3)=(x-5)-(4x-1)=(3-5)-(4(3)+1)=(-2)-(12+1)=(-2)-(13)=-15 substitute 3 for x