Factoring a Polynomial: Finding the Missing Factor in 7X2(X - 2) - (X - 2)

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SUMMARY

The polynomial expression 7X²(X - 2) - (X - 2) can be factored to yield the result (7X² - 1)(X - 2). The key step in this process is recognizing that instead of dividing by (X - 2), one should factor it out from the expression. This results in the simplified form {X - 2}{7X²(1) - 1(1)}, confirming the final answer.

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  • Understanding polynomial expressions and factoring techniques
  • Familiarity with the distributive property in algebra
  • Knowledge of factoring out common terms
  • Basic algebra skills, including manipulation of algebraic expressions
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  • Study polynomial factoring methods, focusing on common factors
  • Learn about the distributive property and its applications in algebra
  • Practice problems involving factoring polynomials with multiple terms
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Ryuk1990
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Homework Statement



7X2(X - 2) - (X - 2)

2. The attempt at a solution

Ok, this is really simple but for some reason I can't figure out why the answer has to be (7X2 - 1)(X - 2)

The process is that I have to divide both parts by (X - 2). However, if I do that, I only get 7X2 - 1. Where does that (X - 2) come from for the final answer?
 
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Ryuk1990 said:

Homework Statement



7X2(X - 2) - (X - 2)

2. The attempt at a solution

Ok, this is really simple but for some reason I can't figure out why the answer has to be (7X2 - 1)(X - 2)

The process is that I have to divide both parts by (X - 2). However, if I do that, I only get 7X2 - 1. Where does that (X - 2) come from for the final answer?

you don't divide it, you factor it out.

you'll be left with

{x-2}{7x2(1)-1(1)}

understand?
 


Ah yes yes yes. I see it now. Thanks. :-)
 

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