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Intermediate Algebra and Functions Videos 36 videos

TSI Math: Understanding Points of Intersection
17 Views

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...

TSI Math: Solving a Quadratic Equation for x
5 Views

What is x for the equation 2x² + 36 = -18x?

TSI Math: Finding a Line's x-Intercept Given a Point on that Line
4 Views

Which of the following points is a location where the function f(x) = -2x² + 12x + 54 crosses the horizontal axis?

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TSI Math: Identifying Perfect Cube Factors 3 Views


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Description:

Simplify.


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

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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