Question 1194875
g(x+h)=2-(x+h)^2=2-x^2-2xh-h^2
g(x)=2-x^2
subtracting, 
=-2xh-h^2
divide that by h and get -2x-h
as h approaches 0 get-2x
the derivative of 2-x^2 is -2x