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CBSE Class 9 Answered

actorize (x – 3y)3 + (3y – 7z)3 + (7z - x)3
Asked by gujarsurjeet007 | 15 Feb, 2018, 06:52: PM
answered-by-expert Expert Answer
begin mathsize 16px style Here space consider comma space straight a equals straight x minus 3 straight y comma space straight b equals 3 straight y minus 7 straight z comma space straight c equals 7 straight z minus straight x
straight a plus straight b plus straight c equals 0
rightwards double arrow straight a cubed plus straight b cubed plus straight c cubed equals 3 abc space if space straight a plus straight b plus straight c equals 0
rightwards double arrow open parentheses straight x minus 3 straight y close parentheses cubed plus open parentheses 3 straight y minus 7 straight z close parentheses cubed plus open parentheses 7 straight z minus straight x close parentheses cubed equals 3 open parentheses straight x minus 3 straight y close parentheses open parentheses 3 straight y minus 7 straight z close parentheses open parentheses 7 straight z minus straight x close parentheses
end style
Answered by Sneha shidid | 16 Feb, 2018, 09:34: AM
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