Hi,

ax^2 +bx + c = 0

x^2-2x+10=0       

discriminant







     ||   i^2 = -1

 = ± 6i ,  NO real solutions, Note: parabola will NOT cross x-axis





Simplify: 

   || multiplying both numerator and denominator by conjugate (4-i).  Note:  i^2 = -1 







    

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