the graphic, the sign-chart, and the logical connectives method.
Students encountered difficulties when having to deal with logical connectives, exchanging 'and' and 'or' or leaving the solution with no connectives all together (e.
Among students who had only used one method, the most frequent one was the graphic method (10 students); two students used the sign-chart and one student used the logical connectives method.
Table 3 shows that students who first studied the logical connectives tended to use this method for inequalities resulting in a single value, R or [empty set].
The one student who used all three methods in his solutions had first studied the logical connectives method.
Of these twelve students, five first studied the sign-chart, five first studied the graphic method and two first studied the logical connectives method.
Typical logical connectives method errors included incorrect application of logical connectives and incorrect/no solution when the quadratic expression was non-factorable.