y-x=1
x2-y=5
y = 1 + x
x² - (1 + x) = 5
y = 1+ x
x² - 1 - x = 5
y = 1 + x
x² - x - 1 - 5 = 0
y = 1 + x
x² - x - 6 = 0
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x² - x - 6 = 0
D = (-1)² - 4 * 1 * (-6) = 1 + 24 = 25 > 0 ⇒ уравнение имеет 2 корня
√D = 5
1 + 5
Х1 = ---------- = 6 / 2 = 3
2
1 - 5
Х2 = ---------- = -4 / 2 = -2
2
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1)
y = 1 + x
x = 3
y = 1 + 3
x = 3
y = 4
x = 3
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2)
y = 1 + x
x = -2
y = 1 + (-2)
x = -2
y = 1 - 2
x = -2
y = -1
x = -2