Question

Given the functions f(x) = 2x + 1 and g(x) = 5x +4, find m(x) = f(x) - g(x)?

А. m(x) = 3x + 3

B. m(x) = -3x + 5

C. m(x) = -3x - 3

D. m(x) = 7x + 5​

Answer 1

m(x) =-3x -3

Explanation:

f(x) = 2x + 1

g(x) = 5x +4

f(x) -g(x) = 2x + 1 -( 5x +4)

Distribute the minus sign

f(x) -g(x) = 2x + 1 -5x -4

Combine like terms

= 2x-5x +1 -4

= -3x -3