Query Detail : IBPS RRB Clerk Pre

sir , is there any short trick to attempt quadratic equation .. i search it on you tube but all short tricks are not correct. My attempt is very slow . If I go to basic then it takes more time ..please sir help me
Hiramani Talukdar,   August 16th 2019,  
IBPS RRB Clerk Pre


Yes , watch these videos:

https://www.youtube.com/watch?v=7zF-kKye29Q

https://www.youtube.com/watch?v=MTsr74kfnDY