(x-2)(x-3)(x 4)(x 5)-60

问题描述:

(x-2)(x-3)(x 4)(x 5)-60

(x-2)(x-3)(x-4)(x-5)-60
=(x-2)(x-5)(x-3)(x-4)-60
=(x*x-7x+10)(x*x-7x+12)-60
貌似实数内分解不了