ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Absolute Value Functions Videos 5 videos

CAHSEE Math 1.4 Algebra I
235 Views

CAHSEE Math Algebra I: Drill 1, Problem 4. Which of the following is the solution set to the equation?

CAHSEE Math 1.5 Algebra I
269 Views

CAHSEE Math 1.5 Algebra I. Find the solution to the absolute value inequality.

CAHSEE Math 2.1 Algebra I
209 Views

CAHSEE Math 2.1 Algebra I. What is the solution set for the equation?

See All

CAHSEE Math 2.1 Algebra I 209 Views


Share It!


Description:

CAHSEE Math 2.1 Algebra I. What is the solution set for the equation?

Language:
English Language

Transcript

00:03

Here’s an unshmoopy question you’ll find on the exam somewhere you take in life...

00:07

at some point… Good luck.

00:10

What is the solution set for the equation…

00:12

the absolute value of x minus 2 equals the absolute value of x plus 3?

00:17

And here are the potential answers...

00:23

So… what is this question asking?

00:24

Well, since this is an absolute value calculation, let’s start by just putting the absolute

00:29

value thingies into 4 buckets:

00:33

(x - 2) = (x + 3)

00:35

-(x - 2) = (x + 3)

00:38

(x - 2) = -(x + 3),

00:42

and -(x - 2) = -(x + 3).

00:54

The first and last… as well as the 2nd and 3rd… equations are identical once simplified…

00:59

…so there are actually two versions that require solving:

01:02

x - 2 = x + 3… and -x + 2 = x + 3.

01:08

In the first equation, the x's cancel, which results in no solution…

01:12

…while the second becomes -2x = 1, or x equals negative one-half.

01:18

So answer A is our guy. As in, “Absolutely fabulous.”

Related Videos

CAHSEE Math 5.3 Algebra and Functions
2033 Views

CAHSEE Math: Algebra and Functions Drill 5, Problem 3. Solve the equation.

Piecewise Functions
6147 Views

Don’t even think about starting up your combo lemonade/fro-yo stand without first making sure you understand piecewise functions. You’re just a...

Domain and Range
5384 Views

Domain and range: two terms you will learn to love (or hate with a vengeance). The domain is the set of all possible x values, and range is the set...

Functions as Models
730 Views

Functions briefly flirted with the idea of being infomercial hosts, but they didn’t shine when talking on-camera. They’re much better off in th...

Introduction to Functions
17460 Views

This video will tell you all about the function of functions.