ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
TSI Mathematics Videos 144 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: Adding and Simplifying Fractions 4 Views
Share It!
Description:
What is the sum of
and
?
- Test Prep / TSI
- TSI / TSI Math
- TSI / TSI Mathematics
- Intermediate Algebra and Functions / Rational and Exponential Expressions, Equations, and Functions
- Intermediate Algebra and Functions / Rational and Exponential Expressions, Equations, and Functions
- TSI Mathematics / Intermediate Algebra and Functions
- Test Prep / TSI
- TSI Math / Intermediate Algebra and Functions
Transcript
- 00:01
Okay sy match members Here we go What is this
- 00:04
Some of twenty seven over x squared minus eighty one
- 00:06
and three Acts over x squared minus 80 one Yeah
- 00:14
So today's our lucky day these two fractions already have
- 00:17
the same denominator right there Go right ahead and add
Full Transcript
- 00:19
the numerator is right So we got twenty seven plus
- 00:22
three x Now we need to think about what we
- 00:24
can cancel Well we'll have to factor the numerator and
- 00:27
the denominator factor A three out of the numerator they're
- 00:30
on We've got three times quantity nine plus x and
- 00:34
then x squared minus eighty one Well that's x plus
- 00:37
nine and x minus nine It looks just like that
- 00:40
right You were tipped off that x squared and then
- 00:43
nothing x and then a number there That's perfect square
- 00:46
usually is a big hint on these kind of problems
- 00:48
so recognize it All right well then we have nine
- 00:50
plus acts is uh well x plus nine So cancel
- 00:54
this factor from both sides of the fraction and we're
- 00:56
left with three over x minus nine So the answer
- 01:00
is b and that's it for ah goodbye to this 00:01:03.448 --> [endTime] section
Related Videos
Which is the best way to revise and combine sentences 1 and 2?
Where would the following sentence best be placed?
Which of the following is best to insert at the beginning of sentence 8?
Which is the best location for sentence 9?
Which of the following sentences is best to insert between sentences 11 and 12?