x(x-1)>=(x+2)(x-2)和x^2-4x-5=(x+2)(x-2)
问题描述:
x(x-1)>=(x+2)(x-2)和x^2-4x-5=(x+2)(x-2)
x^2-4x-5
答
-1
x(x-1)>=(x+2)(x-2)和x^2-4x-5=(x+2)(x-2)
x^2-4x-5
-1