Simplification of polynomial division

In summary, the given expression simplifies to 2(x+3) for all x>2. The solution is found by factoring the numerator and denominator and canceling out common terms. Long polynomial division is not necessary.
  • #1
MeDiCS
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Homework Statement


For all x>2, [tex]\frac{2x²+2x-12}{x-2}[/tex] simplifies to:
2(x - 2), x + 3, 2(x + 3)(x - 2), x - 2 or 2(x + 3).
(Problem taken from http://www.analyzemath.com/practice_tests/act/act_sample_1.html" , question five).


Homework Equations


None, AFAIK.


The Attempt at a Solution


I have seen the answer (which is 2(x+3)), but I couldn't figure out how to get there.
 
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  • #2
The problem as you have written it is not the same as in the link. This is the version in the link:
[tex]\frac{2x^2 + 2x -12}{x - 2}[/tex]

Factor 2 out of the numerator and then factor the remaining terms into the product of two binomials.
 
  • #3
(A little typo :P)
Got it, thanks (quite easy, actually). I first thought of long polynomial division, but that's beyond my current knowledge, plus factoring is faster and easier.
 

Related to Simplification of polynomial division

1. What is polynomial division?

Polynomial division is a mathematical process where one polynomial is divided by another polynomial in order to simplify or solve an equation.

2. Why is simplification of polynomial division important?

Simplification of polynomial division is important because it allows us to solve complex equations more easily and efficiently. It also helps us to better understand the relationship between different variables in an equation.

3. How is polynomial division simplified?

Polynomial division is simplified by dividing the terms of the numerator by the terms of the denominator, following the rules of dividing polynomials. This process involves dividing, multiplying, and subtracting terms until the equation is in its simplest form.

4. Can polynomial division be used to solve real-world problems?

Yes, polynomial division can be used to solve real-world problems in various fields such as engineering, physics, and economics. It can help us analyze and model complex systems and make predictions based on the relationships between different variables.

5. What are some common mistakes to avoid when simplifying polynomial division?

Some common mistakes to avoid when simplifying polynomial division include forgetting to divide all terms in the numerator by the first term in the denominator, mixing up the order of terms, and not properly simplifying the final answer. It is important to carefully follow the steps of polynomial division to avoid these errors.

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