3x+1
3x+2(x+1)(x+2)
5x+6(x+1)(x+2)
2x2+5x+2(x+1)(x+2)
Correct answer is C
x+2x+1 - x−2x+2 = (x+2)(x+2)−(x−2)−(x−2)(x+1)(x+1)(x+2)
= (x2+4x+4)−(x2−x−2)(x+1)(x+2) = x2+4x+4−x2+x+2(x+1)(x+2)
= 5x+6(x+1)(x+2)
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