Factoring negative quantity from algebraic expression?

  • #1
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Factoring negative quantity from algebraic expression?

Why is this wrong?

[tex]\displaystyle{28xy^2 - 14x = -14x(-2y^2 + 1)}[/tex]

The book instead does this:

[tex]\displaystyle{28xy^2 - 14x = -7x(-4y^2 + 2)}[/tex]
 

Answers and Replies

  • #2
Your book is incorrect
 
  • #3
Those are both valid factorizations.
 

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