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Describe and correct the error

1. t2-5t=7
   Discriminant=(-5)- 4(1)(7)
   =25-28
   =-3
   DiscriminantFind is negative, so there are no real solutions.

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SURENDRA K. | An experienced,patient & hardworking tutorAn experienced,patient & hardworking tut...
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Discriminant =  (-5)^2 - 4*1(-7)
 
                    = 25+28
 
                    = 53
 
 Discriminant is positive.
We shall have real solutions