a^2 - b^2
(a - b) . (a + b) =
a2-b2
mx - m =
m. (x - 1)
(a + b)2
a2+2ab+b2
2u. u =
2u2
(3d - d) . (3d + d)
9d 2-d2
3x - 9y =
3. (x - 3y)
(3 - b)2
9- 6b+b2
x ( y + x) =
xy + x2
(a2 - 2c) . (a2 + 2c)
a4-4c2
m (2n - m + 1)
(-3x - 2)2
9x 2+12x+4
- 2y (y - 3)
-2y2 + 6y
1/25-b2
(1/5 - b) . (1/5 + b)
120xyz - 60xy - 20xy
20xy (6z - 3 - 1)
(xy- xy)2
x 2y2+2x 2y2+x 2y2
- 3y (m - n + y2)
- 3ym + 3yn -3y3
a6-b8
(a3 - b4) . (a3 + b4)
1/2 m - n =
1/2 (m - 2n)
(-0,5a + b)2
0,25a2- ab+b2
(x+y) . (x + 3) =
x2 + 3x + yx + 3y