Algebraic Polynomials & Identities Questions with Solutions

31 questions8 easy13 medium10 hard

A polynomial is an algebraic expression made of terms with non-negative whole-number powers of a variable. This topic covers the degree and zeros of a polynomial, the remainder and factor theorems, factorisation, and standard algebraic identities such as (a + b)^2, (a - b)^2, a^2 - b^2, (a + b)^3, a^3 + b^3 and a^3 + b^3 + c^3 - 3abc. Identities are among the biggest time-savers in aptitude. Questions that seem to need heavy calculation, such as evaluating x^3 + 1/x^3 when x + 1/x is known, become one-line answers when the right identity is used. The remainder theorem similarly lets you find a remainder without long division: the remainder when p(x) is divided by (x - a) is p(a). Practise the polynomial and identity questions below, each with a step-by-step solution.

  1. Q1.

    If , then is equal to

    A. B. C. D.
    easyView solution ›
  2. Q2.

    What should be subtracted from to obtain ?

    A. B. C. D.
    easyView solution ›
  3. Q3.

    The remainder, when is divided by , is equal to

    A. B. C. D.
    mediumView solution ›
  4. Q4.

    If , then is equal to

    A. B. C. D.
    mediumView solution ›
  5. Q5.

    If , then equals

    A. B. C. D.
    easyView solution ›
  6. Q6.

    The value of is

    A. B. C. D.
    mediumView solution ›
  7. Q7.

    Which of the following is a zero of the polynomial ?

    A. B. C. D.
    easyView solution ›
  8. Q8.

    For and , the value of is

    A. B. C. D.
    easyView solution ›
  9. Q9.

    What is the value of , when ?

    A. B. C. D.
    mediumView solution ›
  10. Q10.

    If the highest common factor of and is , then the values of and will be

    A. B. C. D.
    hardView solution ›
  11. Q11.

    What is the square root of ?

    A. B. C. D.
    mediumView solution ›
  12. Q12.

    If and , then what is the value of ?

    A. B. C. D.
    mediumView solution ›
  13. Q13.

    If are positive integers such that and , then which one of the following will be a possible value of ?

    A. B. C. D.
    mediumView solution ›
  14. Q14.

    What is the simplified value of ?

    A. B. C. D.
    mediumView solution ›
  15. Q15.

    If , then what is the value of ?

    A. B. C. D.
    hardView solution ›
  16. Q16.

    If , then one of the values of is

    A. B. C. D.
    hardView solution ›
  17. Q17.

    What is the value of , when , and ?

    A. B. C. D.
    easyView solution ›
  18. Q18.

    If and , then

    A. B. C. D.
    mediumView solution ›
  19. Q19.

    If and , then the value of will be

    A. B. C. D.
    hardView solution ›
  20. Q20.

    If , and , then what is the value of ?

    A. B. C. D.
    hardView solution ›
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