a제곱과2a를묶으면a(a-2),-2ab와4b를-2b로묶으면-2b(a-2)로(a-2)라는공통인수가생깁니다.정리하면a(a-2)-2b(a-2)=(a-2b)(a-2)가됩니다^^*
[무물보AI] 답변 로딩중...