공통된 부분 나오게 하면 (x+1)(x+6)(x+2)(x+5)-12=(x²+7x+6)(x²+7x+10)-12=(k+6)(k+10)-12=k²+16k+48=(k+4)(k+12)=(x²+7x+4)(x²+7x+12)=(x²+7x+4)(x+4)(x+3)
[무물보AI] 답변 로딩중...