ก. (x + 1)(x² – x + 1)

ข. (x – 1)(x² + x + 1)

ค. x² – 2x + 1

ง. x² + 2x – 1

ก. (2x + y)(x² – 2xy + y²)

ข. (2x – y)(x² + 2xy + y²)

ค. 4x² – 16xy + y²

ง. 4x² + 16xy – y²

ก. x³ – 125 = (x – 5)(x² + 5x – 15)

ข. x³ + 64 = (x – 4)(x² – 4x + 16)

ค. x³ + 27 = (x + 3)(x² – 3x + 9)

ง. x³ – 216 = (x – 6)(x² + 12x + 36)

ก. (x + 10)(x² – 10x + 100)

ข. (x – 100)(x² + 10x – 1,000)

ค. (x + 100)(x² – 10x – 1,000)

ง. (x – 10)(x² + 10x + 100)

ก. 9 – 128x³

ข. 27 + 512x³

ค. 9 + 128x³

ง. 27 – 512x³