Question

Using identity find 396*404​

Answer 1

(400-4)(400+4). (a2-b2=(a-b)(a+b)

so 400 square - 4 square

=160000- 16

159984

hope you understand it

Answer 2

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$(396) \times (404)$

$(400 - 4)(400 + 4)$

using Identity

$(x + y)(x - y) = {x}^{2} - {y}^{2}$

${400}^{2} - {4}^{2}$

$160000 - 16$

$159984$