Level 1
(n−1)(2n−2)
2n2−4n+2
(v−1)(3v−3)
3v2−6v+3
(4n+4)(5n−8)
20n2−12n−32
(x + 3)2
x2 + 6x + 9
(r+1)(r−3)
r2−2r−3
(k−2)(k−3)
k2−5k+6
(5x−2)(5x−8)
25x2−50x+16
(d - 5)2
d2 - 10d + 25
(2x+3)(2x−3)
4x2−9
(3p+3)(3p+2)
9p2+15p+6
(6x+2)(2x+8)
12x2+52x+16
(2x + 1)2
4x2 + 4x + 1
(3n+2)(n+3)
3n2+11n+6
(3p−3)(p−1)
3p2−6p+3
(3x+3)(x+4)
3x2+15x+12
3(x - 2)(x + 4)
3x2 + 6x - 24
(2n+3)(2n+1)
4n2+8n+3
(2x−3)(3x+3)
6x2−3x−9
(5v+4)(3v−6)
15v2−18v−24
- (2x - 3)(4x + 5)
-8x2 + 2x + 15