Algebraic Expressions, Identities and Formulae - Factorisation by Taking Common Factors
Algebraic Expressions, Identities and Formulae - Factorisation by Taking Common Factors
- By expanding the following expression \((x-y)(3x+7)\), show that it can be written as \(3x(x-y)+7(x-y)\).
- Hence factorise \(3x(x-y)+7(x-y)\).
Solution:
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Answer:(a) \((x-y)(3x+7)=3x^2+7x-3xy-7y=3x(x-y)+7(x-y)\). (b) \((x-y)(3x+7)\).
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