Question: Determine the equations of both lines that are tangent to the graph of f(x) = x2 and pass through point (1,-3).
Some of the equations that I could use for this problem are:
y-y1=m(x-x1) (Point-slope Equation)
the derivative of the function f(x) from first principles (the limit of the difference quotient, as h approaches 0)
The Attempt at a Solution
First, I took the derivative of the function x2.
As a result,
f`(x) = 2x
But I'm not sure on how to go from here.