SOLUTION: If f(x)=the square root of (x^2-9), then f(4) is?

Algebra.Com
Question 947282: If f(x)=the square root of (x^2-9), then f(4) is?
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
If f(x)=the square root of (x^2-9), then f(4) is?
----
f(x) = sqrt(x^2-9)
----
Ans: f(4) = sqrt(16-9) = sqrt(7)
----------------
Cheers,
Stan H.
----------------

RELATED QUESTIONS

If f(x) = 11x + 3 and g(x) = square root of x then g(f(2)) =... (answered by stanbon)
If f(x)= the square root of x and g(x)= 5x-6. Then what is... (answered by stanbon)
If f(x+2)=x^2 - x + 9, then what is the value of... (answered by richard1234)
if f(x) = 3x-4 and g(x)= square root of x^2 - 9. Find fog(5). ?? (answered by ewatrrr)
If h is the function given by h(x)= f(g(x)) where f(x)= 3x^2 -1 and g(x)= the absolute... (answered by stanbon)
what is the domain of f(x)= x squared minus 9 what is the domain of f(x)=square root... (answered by edjones)
what is the domain and range of the function... f(x)= square root of (9-x^2)/... (answered by chessace)
f(x)=square root of... (answered by solver91311)
f(x)= "3x-12"-under square root symbol. find the specified function value, if it... (answered by jim_thompson5910)