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secondary 3 | A Maths
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Would long div work?
2 and 4 are factors of 8.
Then, 2 and 4 are also factors of 56.
A factor of a factor is also a factor of the main number.
Similar things can be said about x2 - 3x- 4.
Long division works, but you would probably not want long divisions involving unknowns a and b.
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