Mathematics
Factorise :
a2 - 16b2 - 2a - 8b
Factorisation
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Answer
a2 - 16b2 - 2a - 8b
Using the formula
[∵ (x2 - y2) = (x + y)(x - y)]
= (a2 - 16b2) - (2a + 8b)
= (a - 4b)(a + 4b) - 2(a + 4b)
= (a + 4b)((a - 4b) - 2)
= (a + 4b)(a - 4b - 2)
Hence,a2 - 16b2 - 2a - 8b = (a + 4b)(a - 4b - 2)
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