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ACT Mathematics Videos 164 videos
ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
ACT Math: Intermediate Algebra: Drill 3, Problem 1. Find the fifth number in the series.
ACT Math: Pre-Algebra Drill 1.2. What proportion of Jenna's day is spent Wii-swimming?
ACT Math 1.2 Elementary Algebra 272 Views
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Description:
ACT Math: Elementary Algebra Drill 1, Problem 2. Can you simplify the expression?
- Elementary Algebra / Simplifying expressions
- Product Type / ACT Math
- Foreign Language / Arabic Subtitled
- Foreign Language / Spanish Subtitled
- Foreign Language / Chinese Subtitled
- Foreign Language / Korean Subtitled
- Algebra / Use polynomial identities to solve problem
- Algebra / Use polynomial identities to solve problems
- Elementary Algebra / Understanding algebraic operations
Transcript
- 00:03
Here's your shmoop du jour... extra crackers...free. Simplify: 5y plus 2z plus 3x squared minus
- 00:11
the quantity 2y minus 2z plus 4x And here are the potential answers...
- 00:19
OK so what is this question asking?
- 00:23
Well, this one is really just a gnarly simplification problem. So... put on your simplifyin' pants.
- 00:32
If we take them one by one, we have a positive 3x squared which we'll just leave as is
Full Transcript
- 00:36
-- not much we can do to simplify it.
- 00:41
Which incidentally takes out D and E as options.
- 00:44
So now distribute this negative sign and rewrite the problem and we have
- 00:48
3x squared plus 5y plus 2z minus 2y PLUS 2z minus 4x.
- 00:55
Now we can combine like terms to get 3x squared plus 3y plus 4z minus 4x...
- 01:01
...so the answer is C.
- 01:03
As in, "Can't believe it's not butter."
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