**Find an equation of the line that is tangent to the graph of f and parallel to the given line.**

**Function Line**

f(x) = x^2 2x - y + 1 = 0

**Answer:**

**Find an equation of the line that is tangent to the graph of f and parallel to the given line.**

**Function Line**

f(x) = x^2 2x - y + 1 = 0

**Answer:**