Question

(102)2 – (98)2 is equal to
1. 200
2. 800
3. 600
4. 400

Answer 1

Answer:

400

Step-by-step explanation:

so easy first multiply by 2 to both no and then add both no to each other

Answer 2

Step-by-step explanation:

Given:- $\tt (102)^{2}-(98)^{2}$ To find - value

$\color{magenta}\[ \begin{array}{l} \boxed{\text { Solution:- }}\: \: \: \\ \\ \tt 102 -98^{2} \\ \\ \tt =(102+98)(102-98) \\ \\ \tt =200 \times 4=800 \end{array} \]$

Hence [2] is Correct.