- #1
Painguy
- 120
- 0
Homework Statement
Find all real values x that are fixed by the function y=4-x^2
f(x)=4-x^2
Homework Equations
x=y
The Attempt at a Solution
x=4-x62
0=-x^2-x+4
0=-(x^2+x+(1/4))+(17/4)
This is where i get stuck.
I also have two other problems which iIdo not understand how to work with.
f(x)=7+sqrt(x-1)
f(x)=sqrt(10+3x) -4
The main problem keeping me from doing the the two above is not knowing what to do with the square root of the expression underneath. Thanks in advance.