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secondary 2 | Maths
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Jit meng
Jit Meng

secondary 2 chevron_right Maths chevron_right Singapore

HELPS. THANKS.

Date Posted: 5 years ago
Views: 232
J
J
5 years ago
Trick : x² - y² = (x+y)(x-y)

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
You need to be familiar with factorisations of special expressions such as x2 - y2.

The other method to do this is by simultaneous equations involving one quadratic expression, which is much more tedious, and you probably have not learnt the technique of solving such simultaneous equations yet.