Factoring Quadratic Trinomials of the Form   x² - bx - c  

This is the 4th post in the series on how to factorize quadratic trinomials. This is the last one in its category where we didn't need to take out the greatest common factor from the 3 terms of the given trinomial and the coefficient of the quadratic term (x²) is "1". 

Below is an example with brief explanations: