Paper 2 · Algebra, factorising, indices
Factorise completely ax + x - 3a - 3.
Model answer
(x-3)(a+1)
Also accepted: (a+1)(x-3)
Explanation: x(a+1) - 3(a+1) = (x-3)(a+1).
Derived from ZIMSEC Mathematics Paper 2, June 1999, Q2
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