The answer for this in its simplest form is 7 7 over 3.
so basically to find this you need to times 7 with 7 which equals 49.
52 - 49 = 3.
SO ......
7 3/7
Think lower than 21 I know the answer btw if you needit
This is number 8. the second person got number 9
f(x) = 3/(x + 2) - √x - 3
f(7) = 3/(7 + 2) - √7 - 3
f(7) = 3/9 - √4
f(7) = 0.333 - 2
f(7) = -1.67