Question

If f(x) = √x + 12 and g(x) = 2√x, what is the value of (f-g)(144)?

-84
–60
0
48

Answer 1

I hope this helps you



f (144)= square root of 144+12=12+12=24



g (144)=2.square root of144=2.12=24


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

Answer 2

we have

`f(x)=√(x)+12`

`g(x)=2√(x)`

we know that

`(f-g)(144)=f(144)-g(144)` -------> equation A

Step 1

Find the value of
`f(144)`

For
`x=144`

substitute in f(x)

`f(144)=√(144)+12`

`f(144)=12+12`

`f(144)=24`

Step 2

Find the value of
`g(144)`

For
`x=144`

substitute in g(x)

`g(144)=2√(144)`

`g(144)=2(12)`

`g(144)=24`

Step 3

Find
`(f-g)(144)`

Substitute the values in the equation A

`24-24=0`

therefore

the answer is the option

`0`