Question

. Time taken by light to cross a room is approxi-
mately 10-8 seconds while the time taken by
electron beam to go from source to the screen in
TV tube is approximately 10-7 seconds. Which
time is greater? Compare the two times.​

Answer 1

Answer :

$\sf{(a+b+c)}$

Explanation :

$\sf{a^2 + ab + ac + ba + b^2 + bc + ca + cb + c^2;}$

$\sf{a^2 + b^2 +c^2 + ab +ba +bc +cb + ac + ca ;}$

$\sf{a^2 + b^2 + c^2 + 2ab + 2bc + 2ca; }$

$\sf{so~ here ~we~ get ~(a+b+c)}$