CBSE Class 9 Answered
Factorize : a(cube) - 1/a(cube) + 4
Asked by ardas1994 | 26 Feb, 2010, 07:48: PM
Expert Answer
Did you mean
a3 - 1/(a3 + 4) or a3 - (1/a3) + 4 ?
Please use brackets as indicated above next time, posting any query.
You can use the identity,
a3 - b3 = (a-b)(a2+ab+b2)
so that a3 - (1/a)3 = (a - (1/a)) (a2+1+(1/a2))
Regards,
Team,
TopperLearning.
Answered by | 27 Feb, 2010, 07:45: AM
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