ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Math II Videos 98 videos
We don't like knocking people down to size, but we do like simplifying radicals. Join us?
It's impressive that these expressions are able to stay so rational even when they're having operations performed on them.
CAHSEE Math 2.1 Algebra and Functions 319 Views
Share It!
Description:
Algebra and Functions: Drill Set 2, Problem 1. Simplify the expression.
Algebra and Functions: Drill Set 2, Problem 1. Simplify the expression.
Transcript
- 00:03
And here's your shmoop du jour.
- 00:06
Simplify the expression: colon... negative sign... closed parenthesis.
- 00:11
Very good. Now... simplify this expression:
- 00:15
2(x - 3) - 3(y + 2).
- 00:19
And here are the potential answers...
Full Transcript
- 00:21
And yeah, hit pause, try it yourself first.
- 00:25
OK, this question is asking, "can we distribute factors?"
- 00:29
It would be rude not to answer, wouldn't it?
- 00:31
Remember the formula for distribution of terms? It looks like this:
- 00:36
Then just follow the map...
- 00:39
...and we get 2 times x minus 6 minus 3 times y minus 6.
- 00:45
Tricky thing there -- that 3 is NEGATIVE so don't forget to bring along the negative sign.
- 00:52
This expression simplifies to 2x - 3y - 12...
- 00:56
...and the answer is C. Easy peasy. See? No reason for a frowny face.
Related Videos
CAHSEE Math: Algebra and Functions Drill 5, Problem 3. Solve the equation.
CAHSEE Math: Algebra I Drill 6, Problem 2. Simplify the polynomial.
GED Math 3.1 Expression and Equations. What is the maximum output impedance that the amplifiers can have?