1. (100+1)^2=100^2+2•100•1+1^2=10200
2.(100-1)^2=100^2-2•100•1+1^2=9800
3. 9,9^2=98,01
4. 10,2^2=104,04
1. (100+1)^2=100^2+2•100•1+1^2=10200
2.(100-1)^2=100^2-2•100•1+1^2=9800
3. 9,9^2=98,01
4. 10,2^2=104,04