Question

Simplify each rational expression. If the rational expression cannot be simplified, so state. $\frac{-21}{7 x-14}$ 

   Simplify each rational expression. If the rational expression cannot be simplified, so state.
$\frac{-21}{7 x-14}$
Introductory & Intermediate Algebra for College Students
Introductory & Intermediate Algebra for College Students
Robert F. Blitzer 4th Edition
Chapter 7, Problem 30 ↓
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Simplify each rational expression. If the rational expression cannot be simplified, so state. $\frac{-21}{7 x-14}$
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Transcript

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00:01 To begin the process of simplifying, we're going to be looking to see what we can factor out in the numerator or the denominator.
00:06 So the numerator has nothing in common, so i'm going to leave it alone.
00:09 When the denominator i have a gcf of 7 that i can pull out.
00:12 What that leads me with now is x minus 3.
00:15 When you go to simplify these though, they need to read the exact same thing.
00:19 3 minus x will not cancel out with x minus 3 because it's not the same...
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