Evaluate the limit of the difference quotient. Interpret the limit as the slope of the tangent to a curve at a specific point.

lim [(2+h)^2-4]/h

h->0

my attempt:

I need help with the secondi part. I found the derivative which in this case is M_t=4 to the graph y=x^2 at x=_______? I am not sure how to find x =? at the specific point.

I tried to put M_t=4 into the original eqtn and solve for h but that didn't work. Please provide detailed steps to finishing this problem. Thank you!