✔ 最佳答案
x > y > z
x - 2 = y
y - 2 = z
yz = x^2 - 34
x - 2 = y
x = y + 2
yz = x^2 - 34
y(y - 2) = (y + 2)^2 - 34
y^2 - 2y = (y + 2)(y + 2) - 34
y^2 - 2y = y^2 + 2y + 2y + 4 - 34
y^2 - y^2 - 2y - 4y = 4 - 34
-6y = -30
y = -30/-6
y = 5
x - 2 = y
x - 2 = 5
x = 5 + 2
x = 7
y - 2 = z
5 - 2 = z
z = 3
∴ x = 7 , y = 5 , z = 3