What is the value of the following expression?
394 × 394 + 2 × 394 × 106 + 106 × 106

Correct option is B

Given:

394 × 394 + 2 × 394 × 106 + 106 × 106

Formula Used:

​$$(a + b)^2 = a^2 + 2ab + b^2$$​

Solution:

a = 394 and b = 106

394 + 106 = 500

= (394 + 106)$$^2$$​

= 500$$^2$$​

= 250000