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Question
Factorise completely: 2 - 8x2
Sum
Solution
2 - 8x2 = 2(1 - 4x2)
= 2[(1)2 - (2x)2]
= 2(1 + 2x) (1 - 2x)
Note: a2 - b2 = (a+b) (a-b)
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Factorising Completely
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