Question

(ii) 1 - 4a2 + 4ab - b2 factorise​

Answer 1

Answer:

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Answer 2

Answer:

-(2a-b-1)(2a-b+1)

Explanation:

1-4a^2 + 4ab - b^2

-(4a^2 + b^2 -4ab ) +1

1^2-(2a-b)^2

(1-2a+b)(1+2a-b)