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Help.

 Jan 4, 2018
 #1
avatar+103120 
+1

-x^2  + 5x  =  3       rearrange as

 

x^2  - 5x  +  3   =  0

 

a  = 1    b  = -5    c  = 3

 

So....the solutions are

 

-(-5) ± √  [  (-5)^2  -  4(1)(3)  ]

_______________________

           2(1)

 

 

5  ± √[ 25  -  12  ]

______________

           2

 

5/2   ± √13/2

 

 

 

(-5i)(-3i)  =

 

15i^2  =

 

15(-1)  =

 

-15

 

 

cool cool cool

 Jan 4, 2018

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