Which of the following is the simplest form of x2−4x2+4x+4\dfrac{x^2 - 4}{x^2 + 4x + 4}x2+4x+4x2−4 (assume x≠−2x \neq -2x=−2)?
x+2x−2\dfrac{x + 2}{x - 2}x−2x+2
x−2x - 2x−2
x−2x+2\dfrac{x - 2}{x + 2}x+2x−2
x2−4(x+2)2\dfrac{x^2-4}{(x+2)^2}(x+2)2x2−4