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secondary 2 | Maths
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Date Posted: 2 years ago
Views: 267
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hope this helps :)
Date Posted:
2 years 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).
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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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.
Date Posted:
2 years ago
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