Step 2: Complete the square by adding to both sides of the equation. b (2 (2 Step 3: Factor the perfect square trinomial x 2 + 16x + = -15 Step 4: Take the square root of both sides of the equation Step 5: Write two equations, using both the positive & negative square root, and solve each equation. Dec 17, 2009 · The methods of solving these types of equations that we will take a look at are solving by factoring, by using the square root method, by completing the square, and by using the quadratic equation. Sometimes one method won't work or another is just faster, depending on the quadratic equation given. Converting between the three forms of a quadratic function. 3.2, 3,3. 20-Comparing forms notes. 20-Converting forms worksheet 21/ Nov 18 Solving quadratic equations by factoring 21-Solving equations by factoring notes 21-Functions vs equations worksheet 21-Functions vs equations worksheet solutions 21-Practice problems with solutions: 21-22 ...