factorise 8a cube -b cube -12a square+6ab square
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(2a)^3 - (b)^3 - 3 (2a)^2 (b) + 3 (2a)(b)^2a
(2a - b)^3
the answer is (2a-b) cube.
(2a - b)^3
the answer is (2a-b) cube.
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