Using the identites of algebriac expression , find the following :(i) 403×397(ii) 8.22(iii) 9.7×9.8(iv) 22.92−7.12

Using the identites of algebriac expression , find the following :(i)

1.	Using the identites of algebriac expression , find the following :(i) 403×397(ii) 8.22(iii) 9.7×9.8(iv) 22.92−7.12
Answer» Using the identites of algebriac expression , find the following : $(i) 403 \times 397$ $(i i) {8.2}^{2}$ $(i i i) 9.7 \times 9.8$ $(i v) {22.9}^{2} - {7.1}^{2}$