The value of 1801 × 1801 is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e.3243601.
Given that 1801 × 1801
It can also be written as (1800 + 1) × (1800 + 1) = (1800 + 1)2
⇒ (1800 + 1)2 = 18002 + 12 + 2 × 1800 × 1
[(a + b)2 = a2 + b2 + ab]
⇒ 3240000 + 1 + 3600 = 3243601
Therefore, the value of 1801 × 1801 is 3243601.