Question

Expand by using identities:

1. ( a − 2b)^2

2. ( 5x + 7y)^2

3. 982

4. 2022

5. 16 m2 - 49 n^2

6. 98 x 102

7. ( x − y)^2 - (x + y )^2

8. 1232- 672

9. 103 x 98

10. 9.7 x 9.8​

Answer 1

Answer:

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