Question

using suitable identity . 99^2​

Answer 1

Answer:

9801

Step-by-step explanation:

Identity:

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

Therefore,

${99}^{2} = {(100 - 1)}^{2}$

$= {(100)}^{2} + {(1)}^{2} - 2 \times 100 \times 1$

$= 10000 + 1 - 200$

$= 10001 - 200$

$= 9801$

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