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CBSE Class 9 Answered

Use suitable identities to Factorise 3  - 8y 3 - 62y+ 12y2
Asked by Topperlearning User | 07 Aug, 2017, 03:32: PM
answered-by-expert Expert Answer

 3  - 8y 3 - 62y+ 12y2 

        =3  - (2y) 3 - 6y(- 2y)                             
        =3  - (2y) 3 – 3XX 2y(- 2y)        { [(a - b) 3= a3 - b3- 3 a b(a - b)] where a = , b = 2y}
        = (- 2y) 3
           = (- 2y) (- 2y) (- 2y)
Answered by | 07 Aug, 2017, 05:32: PM
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