Factorise x2 + xy – x – y

(i) x2 + xy – x – y

(ii) y2 – yz – 5y + 5z

Answer :

(i) x2 + xy – x – y

Take out common in all terms,

x(x + y) – 1(x + y)

(x + y) (x – 1)

(ii) y2 – yz – 5y + 5z

y2 – yz – 5y + 5z

Take out common in all terms,

y(y – z) – 5(y – z)

(y – z) (y – 5)

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