I am not for sure how to do this just yet when I figher it out I will try to help you.<span />
X^2+4x-4=8
x^2+4x-4-8=0
x^2+4x-12=0
x^2+6x-2x-12=0
x(x+6)-2(x+6)=0
x+6=0 x-2=0
x=-6 x=2
hope this helps!
For a function to be a function there cannot be any x’s repeated. In this case, you’re looking for a function that has an x repeated. The answer is {(1,1),(1,2),(1,3),(1,4)}