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Quadratic and Other Polynomial Expressions, Equations, and Functions Videos 18 videos
Two parabolas are graphed in the coordinate plane. Parabola A is a function, and parabola B is not a function. What is the maximum number of points...
Which of the following points is a location where the function f(x) = -2x² + 12x + 54 crosses the horizontal axis?
TSI Math: Identifying Perfect Cube Factors 3 Views
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Description:
Simplify.
- Test Prep / TSI
- Intermediate Algebra and Functions / Quadratic and Other Polynomial Expressions, Equations, and Functions
- TSI / TSI Math
- TSI / TSI Mathematics
- TSI Mathematics / Intermediate Algebra and Functions
- Intermediate Algebra and Functions / Quadratic and Other Polynomial Expressions, Equations, and Functions
- Test Prep / TSI
- TSI Math / Intermediate Algebra and Functions
Transcript
- 00:01
Okay sy mash bumpers uh here's Another one for you
- 00:05
what's the cube root of forty Okay well it's another
- 00:11
classic situation The question cackles and evil glee throwing us
- 00:15
a doozy like this Thank you Root of forty and
- 00:17
expects us to spend all day finding a number that
Full Transcript
- 00:20
equals forty Wynant's multiplied by itself three times Yeah well
- 00:22
the answer choice is always out Tio foil the questions
- 00:26
Plans whisper another secret Hey we all contain a cube
- 00:30
root So there's no hole number That equals forty when
- 00:34
it's cubed look for perfect cube factors of forty instead
- 00:39
Yeah That's How all these questions talking like a moron
- 00:42
All right well don't mind if we do We follow
- 00:44
the road here The factor pairs of forty are ten
- 00:47
and four five and eight two and twenty And of
- 00:49
the factors listed well eight is the only perfect cube
- 00:53
right to tend to tend to so used a factor
- 00:55
Pair of eight and five to rewrite Forty When we
- 00:58
get to cuba to forty is the cube root of
- 01:00
eight times five which is equivalent to the cube root
- 01:03
of eight multiplied by the cube root of five And
- 01:06
well we know the cube root of eight There is
- 01:09
to so we just multiply right Took two times cuba
- 01:13
to five That's a simplified form of the cube root
- 01:16
there and hopefully fall for neither trick questions they threw
- 01:20
at you That's it forty is two times cuba to
- 01:22
five and the answer is a and we're done We're
- 01:25
shmoop
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