Hi,

2y^2=6y-20

2y^2-6y = -20

2(y - 3/2)^2 -9/2  = -20 

2(y - 3/2)^2 =  -31/2

  (y-3/2)^2 = -31/4

     y = 3/2 ± isqrt(31)/2

Checking using Quadratic Formula     

2y^2-6y + 20 = 0





 

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