(x-2)(x+3)-x^2+x-7 크기

(x-2)(x+3)-x^2+x-7 크기

(x-2)(x+3)-(x²+x-7)
=x²+x-6-x²+x+7
=1>0
그래서(x-2)(x+3)>x&\#178;+x-7