ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Basic Operations Videos 58 videos

Operations with Rational Expressions
8687 Views

It's impressive that these expressions are able to stay so rational even when they're having operations performed on them.

Numbers and Operations: Elementary Number Theory
606 Views

Jack and Jill went up the hill to fetch a pail of water. But what happened when they got up there? They’ve been gone an awfully long time…

SAT Math 7.3 Algebra and Functions
318 Views

SAT Math 7.3 Algebra and Functions

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
6148 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
5385 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.