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Math II Sucks... 

x^3 - 7x + 6x = 0

 Feb 3, 2019
 #1
avatar+101871 
+2

x^3 - 7x + 6x = 0    simplify

 

x^3 - x = 0             factor

 

x ( x^2 - 1)     =

 

x(x + 1) (x - 1) = 0

 

Setting each factor to 0 and solving for x   produces  

 

x = 0        x = -1       and    x = 1

 

 

cool cool cool

 Feb 3, 2019
 #2
avatar+18492 
+1

Maybe that was meant to be

 

x^3 -7x^2+6x = 0   ?    factor out 'x'

 

x (x^2-7x+6) =0    factor

x (x -6)(x-1)= 0      

 

Set each factor = 0 and solve for 'x'   =     0    6     1

 Feb 3, 2019

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