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Playlist GED Math: Rational Numbers 15 videos
GED Math: Rational Numbers Drill 1, Problem 1. Reduce the fraction.
GED Math 1.3 Rational Numbers. Which answer best fills in the blank?
GED Math 1.3 Rational Numbers 367 Views
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Description:
GED Math 1.3 Rational Numbers. Which answer best fills in the blank?
Transcript
- 00:00
Thank you We sneak in then here's your smoke du
- 00:05
jour brought to you by fractional exponents Maybe finding a
- 00:09
hobby would make them feel whole again All right so
- 00:13
sixty four to the two thirds is equivalent to the
- 00:17
something root of sixty four square All right so you've
Full Transcript
- 00:24
got a fifty fifty shot here The only choices in
- 00:27
the drop down our square and cube You know we
- 00:30
could flip a coin but well we wore our skinny
- 00:33
jeans today and bad things happen All right This question
- 00:36
wants to know is sixty four to the two thirds
- 00:39
power equivalent to the square root of sixty four squared
- 00:42
or the cube root of sixty four squared We hear
- 00:46
of you always thinking times right All right So let's
- 00:49
consider the first option What's the square root of sixty
- 00:52
four squared isn't just sixty four Yeah go in sixty
- 00:56
four can't be the same Is sixty four to the
- 00:58
two thirds power so it looks like square can be
- 01:02
the right answer That leaves just one option cube but
- 01:06
because we don't like to settle for the process of
- 01:08
elimination Well let's just see why that is well when
- 01:11
dealing with fractional exponents the numerator is the power of
- 01:15
the power and the denominator is the route I don't
- 01:19
have a roof All right Which is why the square
- 01:22
root of sixty four squared comes out to just sixty
- 01:24
for because it's the same as sixty four to the
- 01:27
to over to power which is just one or sixty
- 01:30
four to the first and anything to the first power
- 01:33
is just itself It's like me find one So when
- 01:36
we see sixty four to the two thirds power it's
- 01:39
the same as saying the cube root of sixty four
- 01:42
square that free goes under work And yeah our answer
- 01:47
is definitely cute Unless the question is why can we 00:01:50.336 --> [endTime] no longer feel our legs how it hurts
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It's impressive that these expressions are able to stay so rational even when they're having operations performed on them.