8X^2 - 4X^2 factor out a 4X^2 4X^2(4 - 1) all I can see to do
(2x - 1)(4x + 1)
(4x - 3)(2x + 3)
(2x - 1)(2x + 5)
(4x-8)(2x+2)
(z - 8x)(z + 8x)
8x^2 + 6x - 5 = 8x^2 + 10x - 4x - 5 = 2x * (4x + 5) - (4x + 5) = (2x -1) * (4x + 5)
8x2 -18x+9=(2x+-3)(4x+-3)
2(4x - 3)
(8x - 3)(8x + 3)
(x-3)(3x+1)
2