Day 79 and 80

Algebra: Chapter 9-4, p 413 (Thursday)

Inequalities and Absolute Value

We do the same thing as yesterday’s lesson. We find the 2 equations to solve. There are 2 differences however:

If the equation is of the form  ${\displaystyle \left|A\right|\le b}$, then this is called a CONJUNCTION and the solution space is IN BETWEEN EACH DATA POINT.

If the equation is of the form ${\displaystyle \left|A\right|\ge b}$, then this is called a DISJUNCTION and the solution space is TO THE LEFT AND RIGHT OF THE 2 POINTS.

Here are some examples for purplemath.com that talk about today and yesterday’s lesson.

Algebra: Chapter 9-3, p 411 (Wednesday)

Equations and Absolute Value

To solve and equation of the form ${\displaystyle \left|A\right|=b}$, just solve 2 the 2 equations ${\displaystyle A=b}$ and ${\displaystyle A=-b}$. We have 2 equations to work on but remember that the absolute value CAN NEVER BE NEGATIVE!

As an example to solve ${\displaystyle |5x-3|=17}$, you solve the 2 equations  ${\displaystyle 5x-3=17}$ and ${\displaystyle 5x-3=-17}$

Math-8: Chapter 6 TEST (Thursday)

Math-8: Chapter 6 Quiz C/D (Wednesday)