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Help 2 

NotSoSmart  Feb 27, 2018
 #1
avatar+90023 
+1

x^2  - 16                x^2 + 5x + 4

__________    ÷    ___________

x^2 + 5x + 6          x^2 - 2x  - 8

 

 

(x + 4) (x - 4)             (x + 1) ( x + 4)

____________    ÷    ___________

(x + 3) ( x + 2)            (x - 4) ( x + 2)        invert the second faction and multiply

 

 

(x + 4) ( x - 4) (x - 4) ( x + 2)

______________________

(x + 3) ( x + 2) (x + 1) (x + 4)

 

 

(x - 4)^2 

____________       x cannot be    -3,  -2, 4, -1, -4

(x + 3) ( x + 1)

 

Third answer

 

 

cool cool cool

CPhill  Feb 28, 2018
 #2
avatar+90023 
+1

4a^5          2b^2

____   *   _____             swap denominators

7b^4          2a^4

 

 

4a^5         2b^2

____   *   ______

2 a^4        7b^4

 

 

2a  *    2

         ______

          7 b^2

 

 

4a

___

7b^4

 

Second answer, NSS!!!

 

cool cool cool

CPhill  Feb 28, 2018

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