1)
Проверка:
0² - 25 · 0 = 0 25² - 25 · 25 = 0
0 - 0 = 0 25² - 25² = 0
0 = 0 0 = 0
2)
Проверка:
0² + 25 · 0 = 0 (-25)² + 25 · (-25) = 0
0 + 0 = 0 25² - 25² = 0
0 = 0 0 = 0
3)
Проверка:
0² - 1,7 · 0 = 0 1,7² - 1,7 · 1,7 = 0
0 - 0 = 0 1,7² - 1,7² = 0
0 = 0 0 = 0
z=y+10
z=x+y
x=10(1 сосуд), y=3(2 сосуд), z=13(3 сосуд)