x(x-1)>=(x+2)(x-2)和x^2-4x-5=(x+2)(x-2)x^2-4x-5
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x(x-1)>=(x+2)(x-2)和x^2-4x-5=(x+2)(x-2)x^2-4x-5
x(x-1)>=(x+2)(x-2)和x^2-4x-5=(x+2)(x-2)
x^2-4x-5
x(x-1)>=(x+2)(x-2)和x^2-4x-5=(x+2)(x-2)x^2-4x-5
-1
(1)X>=4 (2)-3/4