Question

37^2-13^272^2-28^242,4^2-42,3^26,8^2 - 3,2^2ФОРМУЛА РАЗНОСТИ КВАДРАТОВ

Answer 1

$37^2-13^2=(37-13)(37+13)=34*50=1700\\ 72^2-28^2=(72-28)(72+28)=44*100=4400\\ 42,4^2-42,3^2=(42.4-42.3)(42.4+42.3)=0.1*84.7=8.47\\ 6,8^2 - 3,2^2=(6.8-3.2)(6.8+3.2)=3.6*10=36$