Factorize : a(cube) - 1/a(cube) + 4

Asked by ardas1994 | 26th 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  | 27th Feb, 2010, 07:45: AM

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