Diketahui fungsi f(x) = x^2-2x+2 dan g(x) = x+1 tentukan A. (f+g) (5) B. (2f-5) (2)

jawab
f(x) =  x² - 2x  +2
g(x)=  x+ 1

a. (f+g)(x) = x² - 2x + 2 + x + 1
(f+g)(5) = 5² -2(5) + 5 + 1
(f+g)(5) = 21

b. (2f -5) (2) =
(2f -5) (x) = 2 (x² -2x+2) - 5
(2f -5) (2) = 2 (2² -2(2)+2) - 5
(2f-5)(2) = 2(2) - 5 = -1