Question

Evaluate 105x97using suitable identity

Answer 1

$\color{aqua}answer : -$

$(105 \times 97) \\ = > (100 + 5)(100 - 3) \\ = > 100(100 - 3) + 5(100 - 3) \\ = > 10000 - 300 + 500 - 15 \\ = > 10000 + 500 - 300 - 15 \\ = > 10500 - 315 \\ = > 10185$

hope it helps ....