1) x² - x - 2 = (x - 2)(x + 1)
2) x² + 2x - 3 = (x + 3)(x - 1)
3) x² - 4x - 5 = (x - 5)(x + 1)
4) x² - 6x - 7 = (x - 7)(x + 1)
5) x² + 6x - 7 = (x + 7)(x - 1)
6) x² - 8x - 9 = (x - 9)(x + 1)
7) x² - 5x + 6 = (x - 2)(x - 3)
8) x² + 5x + 6 = (x + 2)(x + 3)
9) x² + 7x + 12 = (x + 3)(x + 4)
10) x² - x - 2 = (x - 2)(x + 1)
11) x² + x - 2 = (x + 2)(x - 1)
12) x² - 9x + 20 = (x - 4)(x - 5)
13) x² + x - 20 = (x + 5)(x - 4)
14) 4x² + 4x - 3 = (2x - 1)(2x + 3)
15) 4x² - 7x - 2 = (4x + 1)(x - 2)
16) 4x² + 5x - 6 = (4x - 3)(x + 2)
17) 4x² + 15x + 9 = (4x + 3)(x + 3)
18) 9x² - 6x - 3 = (3x + 1)(3x - 3)
19) 2x² - 3x - 2 = (2x + 1)(x - 2)
20) 6x² + 7x + 2 = (2x + 1)(3x + 2)
21) x² - x - 12 = (x - 4)(x + 3)
22) x² + xy - 2y² = (x + 2y)(x - y)
23) x² - 3xy + 2y² = (x - 2y)(x - y)
24) x² - xy - 6y² = (x - 3y)(x + 2y)
25) 2x² - 3xy - 2y² = (2x + y)(x - 2y)
26) 6x² - xy - y² = (2x - y)(3x + y)
27) 3x² + 8xy - 3y² = (3x - y)(x + 3y)
28) x² - x - xy - 2y² + 2y = (x - 2y)(x + y - 1)
29) x² + 2y² - 3xy + x - 2 = (x - 2)(x - y + 1)
30) x² + x - xy - 2y² + y = (x - 2y)(x + y + 1)