P = x - y; q = xy
p^2 = (x - y)^2 = x^2 - 2xy + y^2 = x^2 + y^2 - 2q
x^2 + y^2 = p^2 + 2q
По действиям
3 7/25+2,72=82/25+272/100=336/100+272/100=608/100=6,08
608/100*5/24=19/15
19/15 : 15/16=19/15 * 16/15=304/225
304/225 : 3 3/4= 304/225 * 4/15=1216/3375
1216/3375-2/9=1216/3375-750/3375=466/3375
0,36+0,224/0,35=0,36+0,64=1
1*5=5
466//3375-5= -4 2909/3375
5,85 : 1 19/20=585/100*20/39=15/5=3
3- 2 5/9=4/9
4/9 : 4= 4/9*1/4=1/9
4 2909/3375 : 1/9=16409/3375*9/1=16409/375=43,8
7640м=7,64км
7385м=7,385км
15030=15,03км