Posted by ladybug on .
Answer the following function.
f(x)=2x^2x1
A. Is the point (2,9) on the graph of f?
B. If x equals 2, what is fx? What point(S) are on the graph of f?
c. if f(x)= 1, what is x? what point(s) are on the graph of f?
d. what is the domain of f?
e. List the xintercpts, if any, of the graph of f.
f. List the yintercept if any, of the graph of f.
**Can someone please help me with this. I have no idea, i'm lost!!!

college algebra, Please help!! 
Jennifer,
A. is f(2) = 9? if it is, then the point (2,9) is on the graph. Otherwise, it's not on the graph
B.Plug 2 into f(x)
f(2) = 2 * (2^2)  2  1
The points on this graph are (2, f(2))
C. Solve
1 = 2*x^2x1
You should find two solutions for x.
D. The domain of f is the range of values for x for which f(x) is real. In this case, the domain is infinity to infinity
E. Find the solutions when x = 0:
2*0^2  0  1 = f(x=0)
F. Find the solutions when f(x) = 0
0 = 2*x^2 x  1
Solve for the two values of x that make this equation true