Question

$99 {}^{2} - 98 {}^{2}$
Wid formula​

Answer 1

Here is ur ✍️ required answer

✪ Formula used
$(a - b) {}^{2} = {a }^{2} + {b}^{2} - 2ab$
✪Calculation
$99 {}^{2} - 98 {}^{2}$
$(100 - 1) { }^{2} - (100 - 2) {}^{2}$
$(10000 + 1 - 200) - (10000 + 4 - 400)$
$9801 - 9604$
$197 \: ans.$