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35. x^3-3x^2+3x-1
=(x)^3-3.x^2.1+3.x.(1)^1-(1)^3
=(x-1)^3
36. 27x^3-108x^2+144x-64
=(3x)^3-3.(3x)^2.4+3.3x.(4)^2-(4)^3
=(3x-4)^3
37 . x^3-27y^3-9x^2y+27xy^2
=x^3-9x^2y+27xy^2-27y^3
=(x)^3-3.x^2.(3y)+3.x.(3y)^2-(3y)^3
=(x-3y)^3
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