8a3-1/8b3-6a2b+3/2ab2
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2a^3-1/2b^3-3×(2a)^2×1/2b+3×2a×(1/2b)^2
=(2a-1/2b)^3
=(2a-1/2b)^3
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so easy it's (2a - 1/2b)3 , please subscribe my YouTube channel called sethjigamer
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