y=x^2-5
x^2+y^2=25
из (1) в (2)
x^2+(x^2 - 5)^2=25
x^2 + x^4 - 10x^2 + 25 = 25
x^4 - 9x^2 = 0
x^2(x^2 - 9) = 0
x^2(x - 3)(x + 3) = 0
1. x = 0
y = 0 - 5 = -5
2. x = 3
y = 3^2 - 5 = 4
3. x= -3
y = (-3)^2 - 5 = 4
ответ (0, -5) (3, 4) (-3, 4)
y=x^2-5
x^2+y^2=25
из (1) в (2)
x^2+(x^2 - 5)^2=25
x^2 + x^4 - 10x^2 + 25 = 25
x^4 - 9x^2 = 0
x^2(x^2 - 9) = 0
x^2(x - 3)(x + 3) = 0
1. x = 0
y = 0 - 5 = -5
2. x = 3
y = 3^2 - 5 = 4
3. x= -3
y = (-3)^2 - 5 = 4
ответ (0, -5) (3, 4) (-3, 4)