1) 8x3+1 a) (2x - 1)(4x2 - 2x + 1) b) (2x + 1)(4x2 - 2x + 1) c) (2x + 1)(4x2 + 2x + 1) d) (2x + 1)(4x2 - 2x - 1) 2) 1000 - x3y3 a) (10 - xy)(100 - 10xy + x2y2) b) (10 - xy)(100 + 10xy - x2y2) c) (10 - xy)(100 - 10xy - x2y2) d) (10 - xy)(100 + 10xy + x2y2) 3) 64x3 +729 a) (4x - 9)(16x2 - 36x + 81) b) (4x - 9)(16x2 + 36x + 81) c) (4x + 9)(16x2 - 36x + 81) d) (4x + 9)(16x2 - 36x - 81) 4) x3 - 512y3 a) (x - 8y)(x2 +8xy + 64y2) b) (x + 8y)(x2 +8xy + 64y2) c) (x + 8y)(x2 - 8xy + 64y2) d) (x - 8y)(x2 +8xy - 64y2) 5) 125x3 + 216y3 a) (5x - 6y)(25x2 - 30xy + 36y2) b) (5x + 6y)(25x2 + 30xy + 36y2) c) (5x + 6y)(25x2 - 30xy + 36y2) d) (5x - 6y)(25x2 + 30xy + 36y2)

Factoring Sum and Difference of Two Cubes

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