Simplify x2+4x+4\sqrt{x^2 + 4x + 4}x2+4x+4 (assume x≥−2x \geq -2x≥−2)
x+2x + 2x+2
x+4x + 4x+4
x2+2\sqrt{x^2} + 2x2+2
(x+2)2(x+2)^2(x+2)2