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Find a cubic function with the given zeros.

-2, 5, -6

 Apr 19, 2018
 #1
avatar+98005 
+1

We have

 

(x +2) (x - 5) ( x + 6)

 

[ x^2 + 2x - 5x - 10 ]  [ x + 6 ]

 

[ x^2 - 3x - 10] [ x + 6 ] 

 

x [ x^2 - 3x  - 10 ]  +  6 [ x^2 - 3x - 10 ]   

 

x^3 - 3x^2 - 10 x  + 6x^2 - 18x - 60        combine like terms

 

x^3 + 3x^2 - 28x - 60

 

 

cool cool cool

 Apr 19, 2018

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