C-01-Q098mediumsingle_mcqx(x+1)(x+2)(x+3)+1=?x(x+1)(x+2)(x+3) + 1 = ?x(x+1)(x+2)(x+3)+1=?a(x2+3x)2(x^2 + 3x)^2(x2+3x)2b(x2+3x+1)2(x^2 + 3x + 1)^2