[ x^2 + b x + c = 0 ]" and QEPCAD returns a formula like "
[ b^2 - 4 c >= 0]", which is equivalent to the input when
care assumed to range over the real numbers. However, QEPCAD's interactive interface allows the user control of how problems are solved and what kinds of answers are given, and making good use of this interface can drastically reduce the time and space required to solve problems and improve the quality of QEPCAD's results. More Information ...