Question

Evaluate 68 square -42 square/26

Answer 1

68×68-42×42/26
use bodmas rule
4556.1538461538

Answer 2

(68)²-(42)²/26
By (a+b)²=a²+2ab+b²

In Condition 1st

(68)²= 6²+2×6×8+8²
= 36+96+64
(Note::: Don't Add These Values.We need to Sum the Carry on Next term and then to second next)

= Here 6 Is Carry to 96 we get 102
and 10 is Carry to 36

So we get

== 4624


Condition No. 02


Applied The Same Formulae on (42)²

We get 1764

4624-1764/26

110 (Answer)...