Which of the following is a factor of (x + y)3– (×3 + y3)?
(a) x2 + y2 + 2xy
b) ×2+y2 - ×y
(c) xy2
(d) 3xy
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Answer:
x^3+3x^2y+3xy^2+y^3-x^3-y^3
3xy(x+y)
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