Tuesday, May 19, 2015

[S2_20150519XFCH] Chunking for Factorisation

Question


Introduction
     This is a question on factorisation (Am: factoring).  The key to doing this is chunking.  Can you see any chunk (maybe hidden) that is being repeated?  Take this out as the common factor and simplify.  Remember the square-of-differenceidentity  (ab)2 = a2 – 2ab + b2 .

Solution

Summary
     As in this question,  chunking is a very powerful tactic.  When you attempt to solve mathematics problems, open your eyes wide!


H04. Look for pattern(s)
H10. Simplify the problem
H11. Solve part of the problem
H13* Use Equation / write a Mathematical Sentence

Suitable Levels
Lower Secondary Mathematics (usually secondary 2 ~ grade 8 approx.)

* other syllabuses that involve algebraic factorisation and expansion

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