Mathematics

If the polynomial x33 - x22 + 3 is divided by x + 1 = 0, the remainder is :

  1. -1

  2. 1

  3. 3

  4. 2

Factorisation

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Answer

By remainder theorem,

If f(x), a polynomial in x, is divided by (x - a), the remainder = f(a).

Given,

⇒ x + 1 = 0

⇒ x = -1.

Substituting value in x33 - x22 + 3, we get :

⇒ (-1)33 - (-1)22 + 3

⇒ -1 - 1 + 3

⇒ 1.

Hence, Option 2 is the correct option.

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