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1 mark

Which of the following is the value of ?

  1. A
    360
  2. B
    100
  3. C
    260
  4. D
    420

Solution & Step-by-step Explanation

The given numerical expression mirrors the standard algebraic form by letting and :


Applying the identity for the difference of two cubes, :



Canceling out the matching quadratic trinomial factor from both the numerator and denominator reveals:



Substituting back the values assigned to and :

Practice this question

Try it yourself before checking the explanation above.

Which of the following is the value of ?
A
360
B
100
C
260
D
420

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