8.1
(3x^2 + 2) - (4x^2 - x - 9)
-x^2 + x + 11
(x - 4)(x + 2)
x^2 - 2x - 8
(2x - y)^2
4x^2 - 4xy + y^2
s^2 + 10s - 11
(s + 11)(s - 1)
z^2 - 225
(z - 15)(z + 15)
(9x + 6x^3 - 8x^2) + (-5x^3 + 6x)
x^3 - 8x^2 + 15x
(2a - 1)(a - 3)
2a^2 - 7a + 3
(3s + 5)(3s - 5)
9s^2 - 25
y^2 - 10y + 21
(y - 7)(y - 3)
16p^2 - 8p + 1
(4p - 1)^2
(11y^5 + 3y^2 - 4) + (y^2 - y + 1)
11y^5 + 4y^2 - y - 3
(3x - 2)(x + 4)
3x^2 + 10x - 8
2a^2 + 26a = 0
0, -13
a^2 + 5a - 84
(a+12)(a-7)
12 - 48n^2
12(1 - 2n)(1 + 2n)
(3n^2 - 4n + 1) - (8n^2 - 4n + 17)
-5n^2 - 16
(5b^2 - b - 7)(b + 6)
5b^3 + 29b^2 - 13b - 42
8x^2 - 4x = 0
0, 1/2
4n^2 - 7n + 3
y^2 + 3y + yx + 3x
(y + 3)(y + x)
(-k^2 + 7k + 5) - (2k^4 - 3k^3 - 6)
-2k^4 + 3k^3 - k^2 + 7k + 11
(y^2 + 5y + 4)(3y + 2)
3y^3 + 17y^2 + 22y + 8
21h^2 = 7h
0, 1/3
9a^2 - 6a - 24
3(3a + 4)(a - 2)
x^3 + x^2 - 6x - 6
(x + 1)(x^2 - 6)