Multiply: x2−4x2+4x+4\dfrac{x^2 - 4}{x^2 + 4x + 4}x2+4x+4x2−4. What is this expression simplified (exclude x=−2x = -2x=−2)?
x2−4x+2\dfrac{x^2-4}{x+2}x+2x2−4
x−2x+2\dfrac{x-2}{x+2}x+2x−2
x+2x−2\dfrac{x+2}{x-2}x−2x+2
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