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how do i work this out

 Jan 31, 2019
 #1
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Expand   (x + 2) (x - 3) ( x + 5) =

 

( x^2  - x - 6) ( x + 5)  =

 

x^3 - x^2  -  6x + 5x^2 - 5x - 30 =

 

x^3 + 4x^2 - 11x - 30

 

So

 

a = 4      and     b = -30

 

 

 

cool cool cool

 Jan 31, 2019

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