Question

evaluate this..
291×309
...
...
ans will be= 89919

Answer 1

291 × 309

= ( 300 - 9) (300 +9)

= (300)^2 - (9)^2

= 90000 - 81

= 89919

Using identity [ (a +b)(a - b) = a^2 - b^2]

Answer 2

291 × 309

= ( 300 - 9) (300 +9)

= (300)^2 - (9)^2

= 90000 - 81

= 89919

Using identity [ (a +b)(a - b) = a^2 - b^2]