Question

please solve these questions (b,e) I will mark brainlist

Answer 1

Hey Mate !!

Thanks for the question.

Here you go :

Given,

1) ( 102 × 98 ) =

$(100 + 2) \times (100 - 2) = \\ \\ = (a + b) \times (a - b) \\ \\ = {a}^{2} - {b}^{2} \\ \\ = {100}^{2} - {2}^{2} \\ \\ = 10000 - 4 \\ \\ = 9996$

2) 396 × 404

$(400 - 4) \times (400 + 4) \\ \\ = {400}^{2} - {4}^{2} \\ \\ = 160000 - 16 \\ \\ = 15 9984$