SOLUTION: what is the domain of f(x)= x squared minus 9 what is the domain of f(x)=square root of x+2 what is the range of f(x)=square root of x+2 what is the range of f(x)=x square

Algebra ->  Functions -> SOLUTION: what is the domain of f(x)= x squared minus 9 what is the domain of f(x)=square root of x+2 what is the range of f(x)=square root of x+2 what is the range of f(x)=x square      Log On


   



Question 460501: what is the domain of f(x)= x squared minus 9
what is the domain of f(x)=square root of x+2
what is the range of f(x)=square root of x+2
what is the range of f(x)=x squared minus 4
I have been looking and trying to figure out these 4 prooblems for DAYS now! please help me!

Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
domain of f(x)= x^2-9
All real numbers.
.
domain of f(x)=sqrt(x+2)
X[-2, infinity)
.
range of sqrt(x+2)
Y[0, infinity)
.
range of x^2-4
minimum of x is -b/2a = 0/2 = 0
minimum of y when x=0 is 0-4=-4
range=Y[-4, infinity)
.
Ed