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

1. anonymous

$f(x)=\sqrt{x}+12$ what is $f(144)=\sqrt{144}+12$?

2. anonymous

similarly, what is $g(144)=2\sqrt{144}$?

3. warpedkitten

No idea how to do that... @satellite73

4. anonymous

do you know what the square root of 144 is? that is what you need

5. warpedkitten

12?

6. anonymous

not 12? but rather 12 !!

7. anonymous

that makes $f(144)=\sqrt{144}+12=12+12=?$

8. SolomonZelman

satellite73, don't you first subtract g(x) from the f(x) and then plug in 144 for x?

9. anonymous

you can but no need right? $f-g(144)=f(144)-g(144)$ i would compute each number, then subtract

10. anonymous

we have $f(144)=24$ all we need is $$g(144)$$

11. SolomonZelman

Alright, not typical but actually hadier in a way. Sorry for bugging then:)

12. anonymous

what number is $g(144)=2\sqrt{144}$?