Question

f(x)=sqrt x+12 and g(x)=2 sqrt x, what is the value of (f – g)(144)

Answer 1

(f-g)(x)=f(x)-g(x)
(f-g)(144)=f(144)-g(144)

f(144)=√144+12=12+12=24
g(144)=2√144=2(12)=24


(f-g)(144)=24-24=0