12 questions
(x + 3)(x + 4)
(x + 6)(x + 2)
(x - 3)(x - 4)
(x + 1)(x + 12)
(x - 9)(x + 3)
(x + 9)(x - 3)
(x + 3)(x + 3)
(x + 9)(x + 3)
(2x + 1)(x - 7)
(2x + 7)(x - 1)
(2x + 1)(x + 7)
(2x - 1)(x - 7)
(5x + 2)(x - 3)
(5x - 2)(x + 3)
(5x + 1)(x - 6)
(x + 3)(5x + 2)
(3x + 2)(x + 8)
(3x - 2)(x + 8)
(3x - 4)(x + 4)
(3x - 2)(x - 8)
(x + 9)(x + 2)
(x - 9)(x - 2)
(x - 9)(x + 2)
(x + 9)(x - 2)
(6x + 1)(x + 4)
(3x - 4)(2x - 1)
(6x + 2)(x + 2)
(3x + 4)(2x + 1)
(x - 4)(x - 16)
(x + 4)(x + 16)
(x - 8)(x - 8)
(x + 32)(x - 2)
(x - 15)(x + 3)
(x - 15)(x - 3)
(x + 9)(x - 5)
(x + 15)(x - 3)
(4x - 3)(x + 6)
(2x + 9)(2x - 2)
(4x + 3)(x - 6)
(2x - 3)(2x + 6)
(3x - 4)(3x - 2)
(3x + 2)(3x + 4)
(3x + 8)(3x - 1)
(3x + 2)(3x - 4)
(8x - 5)(x + 1)
(4x - 1)(2x - 5)
(4x + 5)(2x + 1)
(8x - 1)(x - 1)