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Sep
24
awarded  Autobiographer
Jun
6
comment quadratic inequality
At first, I did not want to use the absolute value, but I think we have to, directly or in a disguised manner. Students must master the absolute value function in this way.
Jun
6
awarded  Scholar
Jun
6
accepted quadratic inequality
Jun
6
revised quadratic inequality
not relevant
Jun
5
comment quadratic inequality
@hans-lundmark How can i write this?
Jun
5
revised quadratic inequality
simplify the math introduce \Delta
Jun
5
revised quadratic inequality
deleted 14 characters in body
Jun
5
awarded  Student
Jun
5
awarded  Editor
Jun
5
revised quadratic inequality
added 1097 characters in body
Jun
5
asked quadratic inequality