Eric Nicholas K's answer to Suhaina's Junior College 2 H3 Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
I found an alternative. We must do double conjugate. One for the numerator and one for the denominator.

I presume you are able to factorise the resulting denominator’s (x3 - 3x - 2) by Guess and check and Long division.
Eric Nicholas K
Eric Nicholas K
4 years ago
The x - 2 expression which I have found in the middle of my workings is the root cause of why the fraction becomes 0/0. Once this is eliminated, there will no longer be any x - 2 present in the denominator and all other expressions there cannot be zero, so we obtain a nice number.
Suhaina
Suhaina
4 years ago
Now I understand how to do this question. Thank you so much for your help!