Simplify: x2−16x−4\frac{x^2 - 16}{x - 4}x−4x2−16 (assume x≠4x \neq 4x=4).
x+4x + 4x+4
x−4x - 4x−4
x2−4x^2 - 4x2−4
1x+4\frac{1}{x+4}x+41