Tham KY's answer to Zxcvbnm's Junior College 1 H2 Maths question.
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
...
Date Posted:
6 years ago
From the 3rd to 4th step, where did the negative sign for the "e" go to? Thanks.
For LHS, negative within the modulus sign will becomes positive, so it is gone.
For RHS, negative after square becomes positive, so it is also gone.
For RHS, negative after square becomes positive, so it is also gone.
I see. Thank you!
360 Tutoring Program