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

Asked by laxmi.agarwal055 20th February 2018, 11:03 PM
Answered by 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 Expert 21st February 2018, 9:45 AM
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