Answers

2015-10-04T15:01:08+05:30
a^3-1/a^3-2a+2/a
=(a-1/a)(a^2+1/a^2+a*1/a)-2a+2/a  (a*1/a=1)
=(a-1/a)(a^2+1/a^2+1)-2(a-1/a)
=(a-1/a)(a^2+1/a^2+1-2)
=(a-1/a)(a^2+1/a^2-1)
 i hope that this will help u.
1 5 1
Thanks a lot.
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2015-10-04T16:44:26+05:30
a^3-1/a^3-2a+2/a
=(a-1/a)(a^2+1/a^2+a*1/a)-2a+2/a (a*1/a=1)
=(a-1/a)(a^2+1/a^2+1)-2(a-1/a)
=(a-1/a)(a^2+1/a^2+1-2)
=(a-1/a)(a^2+1/a^2-1)
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