Question 50: Factorize: \( 5{x^2} + 5xy – x – y\)

\( 5{x^2} + 5xy – x – y = \left( {5{x^2} + 5xy} \right) – \left( {x + y} \right) = 5x\left( {x + y} \right) – \left( {x + y} \right) = \left( {x + y} \right)\left( {5x – 1} \right)\)