By expanding the following expression $(x-y)(3x+7)$, show that it can be written as \(3x(x-y)

Question

By expanding the following expression $(x-y)(3x+7)$, show that it can be written as $3x(x-y)+7(x-y)$. Hence factorise $3x(x-y)+7(x-y)$.

Accepted Answer

(b)$(x-y)(3x+7)$

Algebraic Expressions, Equations, and Formulae - Factorisation by Grouping