[질문] 개념원리중학수학9가 p.73의모든문제의답을좀알려주세요

계산력강화1번(a+b)(a-b)2/(a+b)(x-y)/(ax+3)(x-2)/(x+y)(x-y)(y-z)/(x+2y-3)(x-2y-3)/(x+y+2)(x-y+2)/(a+b)(x+y)(x-y)(x-y+5)(x+y+5)/(3x-y+2z)(3x-y-2z)