Factorise: a^3 - b^3 - a + b

Asked by laxmi.agarwal055 | 20th Feb, 2018, 11:03: PM

Expert Answer:

begin mathsize 16px style straight a cubed minus straight b cubed minus straight a plus straight b
equals open parentheses straight a minus straight b close parentheses open parentheses straight a squared plus ab plus straight b squared close parentheses minus left parenthesis straight a minus straight b right parenthesis
equals open parentheses straight a minus straight b close parentheses open parentheses straight a squared plus ab plus straight b squared minus 1 close parentheses end style

Answered by Sneha shidid | 21st Feb, 2018, 09:45: AM