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Module 1: Quadratic Trinomials

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Factorising quadratic trinomials

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Algebra - Factorising quadratic trinomials

Factorising quadratic trinomials

Method 1: Trial and error by cross-multiplication

Method 2: Find two numbers _f_ and _s, _such that _f_ x _s _= _a_ x_ c,
_and_ f_ +_ s_ = _b_

Method 3: Include_ a_ in both factors in a fraction over_ a;_ factorise
and then cancel down

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