pls do it.........its very urgent
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Both can be solved by a + b whole cube and a - b whole cube properties respectively!
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1+64x/3= (1)^3+(4x)^3= (1+4x)(1-4x+16x^2
[using identity a^3+b^3=(a+b)(a^2-ab+b^2)
[using identity a^3+b^3=(a+b)(a^2-ab+b^2)
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