Factorising quadratics (Edexcel GCSE Maths): Flashcards
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Factorising quadratics means
Factorising quadratics means
Writing quadratic as product of 2 brackets
Process reversed by factorising
Process reversed by factorising
Expanding brackets
Basic rule: factorise
Basic rule: factorise
Find 2 numbers: add to , multiply to
If > 0 and > 0, signs in brackets
If > 0 and > 0, signs in brackets
Both positive
If > 0 and < 0, signs in brackets
If > 0 and < 0, signs in brackets
Larger +, smaller -
If < 0 and > 0, signs in brackets
If < 0 and > 0, signs in brackets
Both negative
Difference of two squares: form
Difference of two squares: form
factorises to
factorises to
3 requirements: difference of two squares
3 requirements: difference of two squares
2 terms, perfect squares, minus sign
If constant negative, brackets have
If constant negative, brackets have
One + and one -
Always do this after factorising
Always do this after factorising
Check by expanding brackets
Number of brackets in factorised form
Number of brackets in factorised form
Two