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secondary 2 | Maths
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Ram
Ram

secondary 2 chevron_right Maths chevron_right Singapore

Help me to solve this problem

Date Posted: 1 month ago
Views: 68

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Joy Foo Jia Ei
Joy Foo Jia Ei's answer
29 answers (Tutor Details)
1st
hope this helps :)
Eric Nicholas K
Eric Nicholas K
1 month ago
The third last line to the second last line is incorrect.

In general, for expressions of the form ab + cd (ie all four terms a, b, c and d are distinct from one another), they cannot be factorised into (a + c) (b + d).
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Eric Nicholas K
Eric Nicholas K's answer
5923 answers (Tutor Details)
Normally when there are four terms in an expression we group them into twos, but in this case we notice that three of the terms can be grouped together, so we group them into a group of 3 and a stand-alone term instead.