Răspuns:
Explicație pas cu pas:
x = 78/1000
y = 52/100
x + y = 78/1000 + 52/100 = 78/1000 + 520/1000 = 598/1000 = 0,598
y - x = 52/100 - 78/1000 = 520/1000 - 78/1000 = 442/1000 = 0,442
xy = 78/1000*52/100 = 4056/100000 = 0,04056
x^2 = 78/1000*78/1000 = 6084/1000000 = 0,006084
y^3 = 52/100*52/100*52/100 = 140608/1000000 = 0,140608
(10x + y)^2 = (78/100 + 52/100)^2 = (130/100)^2 = (13/10)^2 = 169/100 = 1,69
(x - 10^-1*y)^-2 = (78/1000 - 52/1000)^-2 = (26/1000)^-2 = (1000/26)^2
= 1000000/676 = 1479,289941...
