Question

solve this using Identity (99)^2

Answer 1

hope this will help u dear

Answer 2

The value of $(100-1)^{2}=9801.$

Step-by-step explanation:

We have,

$99^{2}$

To find, the vaue of $99^{2}=?$

∴ $99^{2}=(100-1)^{2}$

Using identity,

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

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

⇒ $(100-1)^{2}=10000-200+1$

⇒ $(100-1)^{2}=9800+1=9801$

Hence, the value of $(100-1)^{2}=9801.$