2(2x - y)(2x + y)

2(2x - y)(2x + y)(4x² + y²)

4

2x

7p

(49p² - q²)

(q² - 49p²)

(7p - 9q)(7p + 9q)

(x - 2)(bx² - 1)

(x - 1) bx²

(bx² - x) x²

(1 - bx²)2

(d - 3)(cd² - 1)

(cd² - 3)

(3 - d)

(3 - d²)cd

(2q + 4p)64p³

64p³ + 8q³

(4p + 2q)(16p² - 8pq + 4q²)

None of these

(2c - 7d)(4c² + 14cd + 49d²)

(2c - 8c³)343d

(8c³ - 2c)(7d + 49)

343 - 8c

(x - 6)(ax² - 1)

(1 - ax²)x

(x - ax²)

(x - 6)

(x + 5)(x - 6)

(x + 6)(x - 6)

(x - 5)

(x - 5)²

(2m - 2n - 4p + 4q)(2m - 2n + 4p - 4q)

(2m + 2n + 4p)

(2n + 2m + 4p + 4q)(2m + 2n)

(4p - 4q)(2n - q)

(6x + 4y)(216x³ - 64y³)

(6x - 4y)(36x² - 24xy - 16y²)

(6x - 4y)(36x² + 24xy + 16y²)

216x³