Hint: Start off by calculating the derivative (and noting that a tangent line has the form y = mx + b where m is the derivative).
If is tangent to , then the slope of the line tangent to is .
To find the point at which is tangent to , we first solve for (in terms of ) in . Plug this -coordinate, which we label , into to determine the -coordinate of the point at which is tangent to , which we call .
Finally, plug the point into and you then should be able to solve for .