[질문] 비상9-가 개넘플러스유형파워 중 유형편55페이지11번~56페이지답좀요꼭요ㅜㅜ

(3)(x-2z)(4x-3y)/11.5/12.3/13.2/14.2/15.(a+1)(b+1)(c+1)/16.(1)(x-2y+3)(x-2y-3),(2)(x+y+z)(x-y-z),(3)(1+x-y)(1-x+y),(4)(z+x-2y)(z-x+2y)/17.5/18.4/19.-2