Question

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Answer 1

1. 1 a²-4

2. 9b²-1

3. a²-4b²

4. 16a²-b²

2. 1 (2x-1)(2x+1)

2. (m-a)(m+a)

3. (a-3y)(a+3y)

4. (7x-11a)(7x+11a)

5. (xy-1)(xy+1)

6. -(a²-4)(a²+4)

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