factorise the following
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mysticd:
post only one question at a time .
yes hes ryt..it will be easier to answer all of them in detail
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1) (x-1/x)(x-1/x-3)
2)(ax^2+1)(a+x)
3)(4-a^3)(2-a)
4)(5x-21)(x+1)
5)(2a-b)(18a-9b-17)
Done!! :)))
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