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CBSE Class 9 Answered

how to factorize x^3-1/x^3-14
Asked by s.thangarajan1984 | 12 Jun, 2018, 02:18: PM
answered-by-expert Expert Answer
Let y=x3 -(1/x3)-14
Put x3=t
So t-1/t -14=0
t2 -14t -1=0
Applying Quadratic formula. We get t=7+5√2 and 7-5√2
So y can be written as
(t-(7+2√5))(t-(7-2√5))=0
Where t= x3
Answered by Arun | 12 Jun, 2018, 05:32: PM

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