both the questions 21 and 22
Kindly refer the link for your query.
https://www.meritnation.com/ask-answer/question/if-x-1-2-root3-find-the-value-of-x3-2x-2-7x-5show-t/number-systems/1195072
Regards
https://www.meritnation.com/ask-answer/question/if-x-1-2-root3-find-the-value-of-x3-2x-2-7x-5show-t/number-systems/1195072
Regards