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Algebra and Functions Videos 30 videos
Algebra and Functions: Drill Set 4, Problem 1. Which of the graphs fits the equation?
Algebra and Functions: Drill 4, problem 2. If the function for the area of a circle with respect to its diameter was graphed in the first quad...
Algebra and Functions: Drill 4, Problem 3. The sum of the quadratic parent function and the line given has which of the following as its graph?
CAHSEE Math 2.1 Algebra and Functions 294 Views
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Description:
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.
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