Simplify: x2−2x−3x2−4x+3\frac{x^2 - 2x - 3}{x^2 - 4x + 3}x2−4x+3x2−2x−3 for appropriate values.
x−1x-1x−1
x−3x−1\frac{x-3}{x-1}x−1x−3
x+1x−1\frac{x+1}{x-1}x−1x+1
x+1x+1x+1