-x2+2x
x - 2
(4x - 3)(2x + 3)
x^2-4x/x^2-6x+8 = x(x-4)/(x-2)(x-4) = x/(x-2)
(3x - 4)(4x - 3)
7x2 -4x -5x2 +2x = 2x2 -2x
4x + 20
-x2+2x
x - 2
x(4x-2)
It is a quadratic expression
(2x-1)(2x-1) = 4x^2 -4x + 1
There is no rational factorisation.
Using the discriminant for a quadratic equation the value of k works out as plus or minus 12.
4(x^2 + x + 3)
4x^2 = 16x 16x - 60x = -44x -44x + 225
(4x - 3)(2x + 3)