Question

The value of [405]sq-[404]sq is

Answer 1

${405}^{2} - {404}^{2}$

${a}^{2} - {b}^{2} = (a + b)(a - b)$

$(405 - 404)(405 + 404)$

$1 \times 809$

$809$

u'r done!!

Thnx✌️♥️~

Answer 2

Answer:-

${(405)}^{2} - {(404)}^{2} \\ (405 + 404)(405 - 404) \\ 809 \times 1 \\ 809$

Thnx✌️♥️~