Mathematics
Factorise :
x2 - y2 - 3x - 3y
Factorisation
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Answer
x2 - y2 - 3x - 3y
Using the formula
[∵ (x2 - y2) = (x + y)(x - y)]
= (x2 - y2) - (3x + 3y)
= (x - y)(x + y) - 3(x + y)
= (x + y)((x - y) - 3)
= (x + y)(x - y - 3)
Hence,x2 - y2 - 3x - 3y = (x + y)(x - y - 3)
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