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Secondary 1 | Maths
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Date Posted: 6 years ago
Views: 268
Off the top of my head, split the square into two brackets and do the expansion first
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Try to expand the answer in d (work backwards) and you will get 9x^2 + 6xy +y^2 - 30x -10y +25
Trick here is to be able to factorise by grouping 3x and y together
Trick here is to be able to factorise by grouping 3x and y together
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