ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Algebra I Videos 30 videos
CAHSEE Algebra I: Drill 1, Problem 1. What are some of the properties used to solve this equation?
CAHSEE Math Algebra I: Drill 1, Problem 2. Find the negative reciprocal.
CAHSEE Math 6.2 Algebra I 290 Views
Share It!
Description:
CAHSEE Math: Algebra I Drill 6, Problem 2. Simplify the polynomial.
Transcript
- 00:03
Here’s your shmoop du jour…
- 00:05
Simplify the polynomial 9x cubed minus 6x squared plus 3x minus 1…
- 00:10
minus… 4x squared minus 2x plus 1… minus… 3x minus 2.
- 00:17
And here are the potential answers...
- 00:23
The problem is testing our ability to apply a negative to a quantity
Full Transcript
- 00:27
so we can rewrite the whole problem to just get rid of the parentheses altogether.
- 00:32
So we get 9x cubed minus 6x squared plus 3x minus 1 minus 4x
- 00:37
squared plus 2x minus 1 minus 3x plus 2.
- 00:41
Note here and here and here how the negatives got flipped…
- 00:46
And now we can just combine terms.
- 00:48
There’s only one cube so leave that alone… and we can rewrite everything as…
- 00:52
…9x cubed minus 10x squared plus 2x… and that’s it.
- 00:56
Our answer is D. As in, "Done."
Related Videos
CAHSEE Math: Algebra and Functions Drill 5, Problem 3. Solve the equation.
GED Math 3.1 Expression and Equations. What is the maximum output impedance that the amplifiers can have?
We don't like knocking people down to size, but we do like simplifying radicals. Join us?