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Rational expressions very simble, but hard for me

  • Thread starter physicsed
  • Start date
52
0
[tex] \frac{5x-5y-bx+by}{5x-5y+bx-by} [/tex]


i can't cancel anything

i can't factor anything

please help
 

Answers and Replies

rock.freak667
Homework Helper
6,230
31
5x-5y=5(x-y)
do the same with b
 
52
0
but the b's (x and y) doesn't cancel since they have two different signs
 
Dick
Science Advisor
Homework Helper
26,258
618
-bx+by=(-b)(x-y). (x-y) IS a factor of both the numerator and the denominator.
 

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