Multiple choice What are the real factors of the expression (x2 + 4)? (x2 + 2) and (x2 + 2) (x2 + 2) and (x2 - 2) x2 and (x2 + 4) (x2 + 2x + 2) and (x2 - 2x + 2) Non existent Reveal answer Fill a bubble to check yourself E Correct answer Explanation It is understood that we restrict ourselves to rational coefficients and integral powers of 'x'. With this restriction, (x2 + 4) is not factorisable. Hence, option (5) is the correct answer.