y=x2-4x+3
5x+y=5
y=5 - 5x
5 - 5x = x2 - 4x + 3
x2 + x - 2 = 0
D = 1 + 8 = 3
x12 = (-1 ± 3)/2 = -2, 1
x1 = -2
y = 5 - 5*(-2) = 15
x2 = 1
y = 5 - 5 = 0
ответ (1, 0) (-2, 15)
y=x2-4x+3
5x+y=5
y=x2-4x+3
y=5 - 5x
5 - 5x = x2 - 4x + 3
x2 + x - 2 = 0
D = 1 + 8 = 3
x12 = (-1 ± 3)/2 = -2, 1
x1 = -2
y = 5 - 5*(-2) = 15
x2 = 1
y = 5 - 5 = 0
ответ (1, 0) (-2, 15)