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Write the rational expressions as equivalent rational expressions with the lowest common denominator.

LCD 

(x − 5)(x + 3)(x + 4)

 

3

x2 − 2x − 15

=

 

8x
x2 − x − 20

=

 Apr 22, 2020
 #1
avatar+20767 
+1

3 / [ x2 - 2x - 15 ]  =  3 / [ (x - 5)(x + 3) ]   =   3(x + 4) / [ (x - 5)(x + 3)(x + 4) ]  or  (3x + 12) / [ (x - 5)(x + 3)(x + 4) ] 

 

8x / [ x2 - x - 20 ]  =  8x / [ (x - 5)(x + 4) ]  =  8x(x + 3) / [ (x - 5)(x + 4)(x + 3) ]  or  (8x2 + 24x) / [ (x - 5)(x + 3)(x + 4) ] 

 Apr 22, 2020

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