Without finding the actual cubes, factorise (x-2y)^3+(2y-3z)^3+(3z-x)^3.
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"Factorise (x – 2y)3 + (2y – 3z)3 + (3z – x)3 ", then
here is the solution :-
Consider (x – 2y) + (2y – 3z) + (3z – x) = x – x – 2y + 2y – 3z + 3z = 0
Using if A + B + C = 0 then A3 + B3 + C3 = 3ABC
∴ (x – 2y)3 + (2y + 3z)3 + (3z – x)3 = 3 (x – 2y) (2y – 3z) (3z – x)
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