Multiple choice

What are the real factors of the expression (x2 + 4)?

  1. (x2 + 2) and (x2 + 2)

  2. (x2 + 2) and (x2 - 2)

  3. x2 and (x2 + 4)

  4. (x2 + 2x + 2) and (x2 - 2x + 2)

  5. 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.