Question

solve above question ✔️✔️

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Answer 1

1. 99 can also be written as

100-1

so the square of 100-1 is

(100-1)^2

by,

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

so,

100^2 - 2(100.1)+2^2

10000-200+4

9800+4

=>9804

2. 89 is also solved by the same method

take a as 90 and be as 1

use identity 2

MAKE AS BRAINIEST ANSWER

Answer 2

Pls find ans in attachment