Question

The value of $(103{)}^2$ using identity is.

• A. 10609
• B. 10906
• C. 10606
• D. 10806

Answer 1

The correct option is A 10609

We know that,
$(a+b{)}^2=a^2+b^2+2ab$

Now,
103 can be written as (100+3).
On applying the identity $(a+b{)}^2$ and
considering, $a$ = 100 and b = 3,

$(103{)}^2$
$={100}^2+3^2+2\times 100\times 3$
$=10609$