(4x - 3)(x - 1)
8x2 -18x+9=(2x+-3)(4x+-3)
OK. 4x2 + 4x + 1 = (2x + 1)2
x2 + 4x + 4 = (x+2)2
That doesn't factor neatly. Applying the quadratic formula, we find two real solutions: -2 plus or minus 0.5 times the square root of 11. x = 0.3416876048223001 x = -3.6583123951777
(4x - 1)(x - 5)
(4x - 3)(x - 1)
There is no rational factorisation.
(2x-1)(2x-1) = 4x^2 -4x + 1
(4x - 3)(2x + 3)
7x2 -4x -5x2 +2x = 2x2 -2x
4x + 20
-x2+2x
x - 2
x2 - 4x - 21 = (x-7)(x+3)
8x2 -18x+9=(2x+-3)(4x+-3)
(2x - 9)(2x - 9) or (2x - 9)2