6. Simplify:
(i) ab(a - b) + b3 (a - 2b)
(ii) - 6x? (xy + 2y2) - 3y2 (2x2 + + y)
(iii) 2x(x - y2) - 3y(xy + 2x) – xy(x + y)
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thanks for new points thanks
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