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Question
Simplify:
(2x + y)(4x2 - 2xy + y2)
Sum
Solution
(2x + y)(4x2 - 2xy + y2)
= 2x(4x2 - 2xy + y2) + y(4x2 - 2xy + y2)
= 8x3 - 4x2y + 2xy2 + 4x2y - 2xy2 + y2
= 8x3 + y3.
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