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Quadratic Formula

Quadratic Formula

Author: Laura Kniffin
Description:

To teach the quadratic formula in an exciting way.

Let's Do Math is a new cutting edge gameshow to help you with some of your troubles in math. More specifically, we take you into the world of polynomials and quadratic equations.

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Tutorial

Review

Before you watch this video you may want to review these terms:

 

Polynomials - sums of variable and exponent expressions.

Quadratic Equation- a polynomial equation of the second degree.   ax2 + bx + c

Variables- any entity that can take on different values. Usually represented by a letter.

Coefficients- a multiplicative factor in some term of an expression (or of a series). It is usually a number.

Let's Do Math!

The exciting gameshow where contestants solve polynomials using factoring and the quadratic formula!

Samsam's Final Answer Explained

The steps Samsam took to correctly answer the final question!

Examples to Try!

1.) y= x2 + 4x + 4

 

2.) y= -10x2 - 9x + 1

 

3.) y= -9x2 - 9x + 6

 

** Be sure to try these yourself before looking at the answers in the next section**

Answers to the examples!

1.) x = -2

 

2.) x = -1 and x = 1/10

 

3.) x = (3±sqrt(33))/ -6