# [S2] Term 1 Week 2 (13-19 Jan) Updates/Debrief

WEEKLY ANNOUNCEMENT FOR SEC 2 PMC (13-19 JAN).
NO LESSON IS SCHEDULED FROM 23-29 JAN (CNY HOLIDAY)

SPECIAL MENTION FROM HQ (CNY HOLIDAY)

Please refer to the term calendar (subjected to changes). https://tinyurl.com/S123AnnualCalendar

There is no lesson scheduled in the week (23 – 29 Jan 2020). No lesson is billed in that week.
Lessons on 21, 22, 30 and 31 Jan is on as per scheduled.

[S2 Maths + Science PMCians]

What we did in 2 hours:

This week, we started our first lesson on Expansion and Factorisation. Recall that expansion is to remove brackets from the algebraic expression and factorisation is simply the reverse, that is to create brackets. You may need to regroup the terms before you can take out any common factors for factorisation.

Most importantly, do memorise these three SPECIAL FORMULAE:

1. (a + b)2= a2 + 2ab + b2
2. (a – b)2= a2 – 2ab + b2
3. a2 – b2 = (a + b)(a – b)

What you take home:

Do remember to complete the selected Take Away Questions on Expansion and Factorisation.

Special Mention:

We will be learning 3-term Factorisation in next lesson. A short test on Expansion and Factorisation will be conducted at the end of the lesson.

Till then, enjoy your CNY break! 🙂