[질문] 2015 체크체크 진도교재 3-1 66~71까지좀요

69쪽:(x-3)2승,(2x+1)(3x+1),(2분의1x+3분의1y)(2분의1x-3분의1y),(4x-5)2승,(a+2)(a-12),2(x+5)(x-5),(a-2분의1)2승,2(x+3)(x-1),(2x-5)(3x+2),(4분1x+y)(4분의