Question

plz answer these questions step by step the one who will answer this correctly i will mark him/her brainlist



you can attach a picture too​

Answer 1

Answer:i) ≈ 102 × 98

≈ 102 (100 - 2)

≈ 10200 - 204

≈ 9996 ans.....

ii) ≈ (101×101)(91×91)

≈ 10,201 - 8281

≈ 1920 ans...

Answer 2

Step-by-step explanation:

not sure what do u mean by rules of identities but here's an interesting answer

1 -

102 x 98

(100+2) x (100-2)

as (a+b) x (a-b) = a^2 - b^2

10000-4

9996

2-

101^2 - 91^2

(100 + 1)^2 - (100-9)^2

as (a+b)^2 = a^2 + b^2 + 2(ab)

and (a-b)^2 = a^2 + b^2 - 2(ab)

=>10000 + 1 + 2(100) - 10000 - 81 + 2(900)

-80+2(1000)

2000-80

=1920