Question

using identify the value of 109²
​

Answer 1

11,881.

109 can be written as 100 + 9.

So, 109² = (100+9)²

Using : (a+b)² = a² + 2ab +b²

Here, a = 100 and b = 9 .

109² = (100)² + 2×100×9 + (9)²

= 10,000 + 1,800 + 81.

= 11,881