Question

If f(x)=square root of x+12 and g(x)=2square root of x, what is the value of (f – g)(144)? –84

–60
0
48

Answer 1

f(x) = √(x)+12
g(x) = 2√x


(f – g)(144) = √(144)+12 - 2√144

(f – g)(144) = 12 +12 - 2(12)

(f – g)(144) = 24 - 24

(f – g)(144) = 0

Answer 2

f(x)=(√x)+12
g(x)=2√x

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

(f-g)(144)=f(144)-g(144)=
(√144)+12-(2√144)=
12+12-2(12)=
24-24=
0
result is 0