Question

answer the question by using the identity given above​

Answer 1

Answer:

1. 99² = (100-1)² = 10000+1-200 = 9801
2. 51² = (50+1)² = 2500+1+100 = 2601
3. 38² = (40-2)² = 1600+4-160 = 1444
4. 101² = (100+1)² =10000+1+200 = 10201
5. 79² = (80-1)² = 6400+1-160 = 6241
6. 399² = (400-1)² = 160000+1-800 = 159201