Когда учитель не оценил твою вайфу
02.11.2016, 11:41
x2 + y2 = 10
x2 * y2 = 9
x2 = 10 - y2
(10 - y2) * y2 = 9
-y4 + 10y2 - 9 = 0
y2 = k
k2 - 10k + 9 = 0
D = 100 - 4 * 9 = 64
k1 = 10 - 8 / 2 = 1
k2 = 10 + 8 / 2 = 9
Если k = 1
x2 + 1 = 10; x2 = 9; x = +-3
x2 * 1 = 9; x2 = 9; x = +-3
Если k = 9
x2 + 9 = 10; x2 = 1; x = +-1
x2 * 9 = 9; x2 = 1; x = +-1
x2 * y2 = 9
x2 = 10 - y2
(10 - y2) * y2 = 9
-y4 + 10y2 - 9 = 0
y2 = k
k2 - 10k + 9 = 0
D = 100 - 4 * 9 = 64
k1 = 10 - 8 / 2 = 1
k2 = 10 + 8 / 2 = 9
Если k = 1
x2 + 1 = 10; x2 = 9; x = +-3
x2 * 1 = 9; x2 = 9; x = +-3
Если k = 9
x2 + 9 = 10; x2 = 1; x = +-1
x2 * 9 = 9; x2 = 1; x = +-1
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