Factorising can be a challenging topic. I have started off with the very basics - factorising trinomials where a = 1, b is positive and c is positive. In other words, looking at a trinomial of the form x^2 + bx + c.  

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Factorising trinomials when a = 1, b and c are positive Factorising trinomials when a = 1, b and c are positive - memo