Вычислите: 5,15^2-2*5,15*3,15+3,15^2 / 7,25^2-2,75^2

Question

Вычислите:
5,15^2-2*5,15*3,15+3,15^2 / 7,25^2-2,75^2

Answer 1

5.15² -2*5.15*3.15 +3.15² =(5.15 -3.15)²

(5.15 -3.15)² /(7.25 -2.75)(7.25 +2.75) =2² /4.5*10 =2/4.5*5 =2/22.5 =2 :225/10 =(2*10)/225 =20/225 =4/45