to this:
" The student 1 the course. A couple on the tower. Preponja considers some example on the board, gets some expression to divide by zero and decides further. Then he looks at us, suddenly silent, and so kindly says, "What, in school, was it not allowed to divide by zero? Now you can!"

You were told in school that if the discriminant is less than zero, then there is no root? It is wrong to say that there are roots.and "
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Why did we go to school? = D