+0  
 
+1
85
1
avatar+2509 

Help #1

NotSoSmart  Feb 23, 2018
 #1
avatar+87333 
+1

1.  Factor both expressions

 

x^2  +  x  -  12  =    (x + 4) (x - 3)

 

x^2 + 2x  - 15  =    (x + 5) (x - 3)

 

The LCM  is just all the different factors we have listed....so....

 

(x - 4)  (x + 5) ( x - 3)  ⇒ second answer

 

 

2.  Notice that we can see if the first numerator factors  using the second denominator

 

(w + 6) ( w - 4)                 8

____________  +         _____

(w + 6) ( w - 5)             ( w - 5)

 

 

 

( w - 4)       +     8

______          _____

(w - 5 )            (w - 5)

 

 

( w - 4 + 8)

_________

  ( w  - 5)  

 

 

w +  4

_____

w  - 5

 

 

 

cool cool cool

CPhill  Feb 23, 2018

3 Online Users

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.