9­4 (Factoring) Part 2 H (taught).notebook
Bell Ringer
1. n2 + 2n ­ 15 = 0
November 07, 2014
2. 5p2 ­ 9p ­ 2 = 0
9­4: Factoring to Solve Quadratic Equations
SPI 3102.3.11 Analyze nonlinear graphs including quadratic functions that model a contextual situation.
SPI 3102.3.10 Find the solution of a quadratic equation and/
or zeros of a quadratic function.
Example: The volume of a sandbox shaped like a rectangular prism is 48 ft3. The height of the sandbox is 2 feet. The width is w feet and the length is w + 2 feet. Use the formula V = lwh to find the value of w and the dimensions of the sandbox.
Assignment
Example: You are making a rectangular table. The area of the table should be 10 ft2. You want the length of the table to be 1 ft shorter than twice its width. What should the dimensions of the table be?
Homework
Punch Line Algebra worksheet 14.10
*On #1­5, use factoring.
pgs. 558­559 (#26­28, 50)
*On #6­8, use graphing.
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