Technical information
Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: Solve the following quadratic equation: \( 2x^2+11x-21=0 \) If your answers are rational, put them in braces {} separated by commas. If your answers are irrational put your answer with the +/- sign in simplest radical form.
Right answer summary: The content can not be displayed.
Question state: todo