As a student, I found that I remembered information a lot easier when the information was in a song.  I learned the 'quadratic formula song' in one of my math classes and have not forgotten the formula since.  Several of my students have also found this song helpful (and catchy!), so I though I'd share:   The 'Quadratic Formula Song' (sung to the lyrics of 'Pop Goes the... read more

Solve By Using the Quadratic Equation Lessons The quadratic formula gives us an alternative to Completing the Square when we cannot factor an equation. People often find the Quadratic Formula method easier and more convenient because it does not require many operations on the equation being solved. For solving an equation in the variable x, the Quadratic Formula is: To find... read more

Quadratic Equations After learning about multiplying binomials using the FOIL method and discussing polynomials, we can move on to working with quadratic equations. Constructing a Quadratic Equation We discovered that a polynomial is a product of two or more binomials. Let's consider the simple equality If two quantities multiply to get zero, does a = 0 or b = 0? or both... read more

ax^2 +bx + c = 0   Example 7x^2 +12x +16 =0   Don't forget the quadratic formula when you come across a quadratic that CAN'T be factored:   x = (-b +/- (sqroot)( b^2 - 4ac))/2a     by the way, for those who don't know, I use the ^ sign as my "power" indicator