Tham KY's answer to daniel's Junior College 2 H2 Maths Singapore question.

Ask ManyTutors
done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Tham KY
Tham Ky's answer
6052 answers (Tutor Details)
daniel
Daniel
3 years ago
hi! why is z* = 1/z
daniel
Daniel
3 years ago
also, why is there no “2ab” term in expansion of “a^2 + b^2” (second last step)? thx