Problem of the week

 

Solve the equation 4x4 - 4x3-13 x2 +9x +9 = 0,  given that the sum of two of the roots is zero.

 

 

Solution :

Roots are 3/2 , -3/2 ,  (1+) /2   , (1-) /2  

 

Correct solution received from:

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