Rozwiąż układy równań.
a)
{y=x+1
{y+=3
c)
{y=3x-8
{y+2=2x-
y = x + 1
y + x² = 3
(x+1) + x² = 3
x² + x - 2 = 0
(x + 2)(x - 1) = 0
x = -2 ∨ x = 1
y = -1 y = 2
b)
y = 3x - 8
y + 2 = 2x - x²
(3x-8) + 2 = 2x - x²
x² + x - 6 = 0
(x + 3)(x - 2) = 0
x = -3 ∨ x = 2
y = -17 y = -2
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a)
y = x + 1
y + x² = 3
(x+1) + x² = 3
x² + x - 2 = 0
(x + 2)(x - 1) = 0
x = -2 ∨ x = 1
y = -1 y = 2
b)
y = 3x - 8
y + 2 = 2x - x²
(3x-8) + 2 = 2x - x²
x² + x - 6 = 0
(x + 3)(x - 2) = 0
x = -3 ∨ x = 2
y = -17 y = -2