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jotag1714 from Open University
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- Posted on Oct 11, 2008 at 9:10:36PM
A:
Preview: ... 2/x^2 = 2x + 5/x^2 + 4x + 3
-x - 1/ ...
The full tutorial is about 55 words long .
$1.50 Solution
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- Posted on Oct 12, 2008 at 5:44:56PM
A:
Preview: ... 5)/(x+1)(x-3)
we find the common denominator, (x-3)(x+1)(x+3) and we put the ...
The full tutorial is about 19 words long .
$150.00 Answer to your algebra question
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- Posted on Oct 12, 2008 at 9:37:13PM
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Preview: ... e answer ...
The full tutorial is about 8 words long plus attachments.
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algebra1.doc (19K) (Preview)
$200.00 solution to your question
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- Posted on Oct 13, 2008 at 10:16:01PM
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Preview: ... diffu\\icult but i ...
The full tutorial is about 23 words long .
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krimage from Wayland
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$150.00 I worked the answer
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- Posted on Oct 14, 2008 at 1:57:59PM
A:
Preview: ... is answer the old fashion way ...
The full tutorial is about 26 words long plus attachments.
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sridevi_chundru from nagarjuna
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- Posted on Oct 22, 2008 at 07:01:19PM
A:
Preview: ... )(x+3)=2x+5/(x+1)(x+3)
cancel 1/(x+1)(x+3) on both sides and multilpy ...
The full tutorial is about 21 words long plus attachments.
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math.txt (0K) (Preview)
$150.00 the solution to your problem is writen below
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- Posted on Oct 29, 2008 at 2:23:24PM
A:
Preview: ... ting the like terms
* x-2x+x-2x-4x-1/x^2+2/x^2-5/x^2=3+9-3
sum it together
* -6x-(1/x^2+2/x^2-5/x^2)=4
the L.C.M of 1/x^2+2/x^2-5/x^2 is =-2/ ...
The full tutorial is about 225 words long .
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Maddy4u from Stratford University
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$140.00 Check out ! Guranteed Solution.......................
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- Posted on Oct 30, 2008 at 05:15:55PM
A:
Preview: ... recedence:
First division or multiplication.As we don't have any multiplication in this equation we take into cons ...
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knair from Calicut REC
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- Posted on Oct 31, 2008 at 06:36:18PM
A:
Preview: ... x+3
5/x^2+6x+3 (1/x^2-12) = 0 ( re arranged the terms)
4/x^2+6x+15 = 0
4+ 6x^3+15x ...
The full tutorial is about 83 words long plus attachments.
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$150.00 Here is the answer
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- Posted on Nov 10, 2008 at 5:10:24PM
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Preview: ... onvergence is ...
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social_babe22 from Axia College University of Phoenix
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$100.00 I am pretty sure this is right- no promises so a lower bounty
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- Posted on Nov 19, 2008 at 8:00:23PM
A:
Preview: ... er example. What is the domain of
(x^2 - x - 2) / (2x^2 - 3x - 2)
(let class solve)
Factoring the denominator: 2x^2 - 3x - 2 = (2x + 1)(x - 2)
So the domain is all real numbers except x = -1/2 and x = 2
B. Simplifying
Factoring also leads to another useful tool for dealing with rational
expressions: simplifying.
We can simplify a rational expression when the numerator and
denominator have a factor in common.
Let's return to our example: (x^2 + x - 2) / (2x^2 - 3x - 2)
We've already factored the denominator, so we know this is
(x^2 - x - 2) / [(2x + 1)(x - 2)]
Now let's factor the numerator too.
(let class do this)
x^2 - x - 2 = (x + 1)(x - 2)
So our polynomial is really
[(x + 1)(x - 2)] / [(2x + 1)(x - 2)]
There's an x-2 on both the top and bottom, so we can cancel them out
and arrive at a simpler expression:
(x + 1) / (2x + 1)
This is what we mean by simplifying a rational expression: we find
common factors in the numerator and denominator, cancel them out, and
wind up with another rational expression for which the polynomials are
of lower order.
Let's try another example. Simplify:
(x^2 + 5x + 6) / (3x^2 + 7x - 2)
(let class do this)
We factor the numerator to get:
x^2 + 5x + 6 = (x + 2)(x + 3)
and the denominator to get
3x^2 + 7x - 2 = (x + 3)(3x - 2)
The x + 3's are in common, so we cancel them and get the simplified
expression
(x + 2) / (3x - 2)
C. Multiplying and Dividing
Multiplying and dividing rational expressions is also pretty
straightforward.
It just follows the same rules and multiplying fractions and
multiplying polynomials.
The rule is that when we multiply, we do top times top and bottom
times bottom.
When we divide, we flip the second rational expression first, then
multiply.
Generally, the one trick is that it is much easier to factor
everything first, before multiplying, because that you can catch when
cancellations will occur.
Let's try an example. Multiply:
(x - 2) / ( ...
The full tutorial is about 1890 words long .
$100.00 Full and Accurate Solution
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- Posted on Nov 25, 2008 at 6:44:22PM
A:
Preview: ... p by s ...
The full tutorial is about 4 words long plus attachments.
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Solution.pdf (45K) (Preview)
