Factorise the following expression:
$x^{2} + x y + 8 x + 8 y$

(x + 8) (x + y)

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(x - 3) (x + y)

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(x + 3) (x - y)

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(x + 8) (x - y)

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Solution

The correct option is A (x + 8) (x + y)
$x^{2} + x y + 8 x + 8 y$
$= x (x + y) + 8 (x + y)$
$= (x + y) (x + 8)$

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