求解初中数学题（x-y)-2(y-x) 2(x-y)-8(y-x) x(a-3)-(3-a) (x2-y2)-3(x+y)求解因式_数学解答

求解初中数学题（x-y)-2(y-x) 2(x-y)-8(y-x) x(a-3)-(3-a) (x2-y2)-3(x+y)求解因式分解法.八年级数学.谢

人气：205 ℃　时间：2020-03-26 18:21:47

解答

（x-y)-2(y-x) =(x-y)+2(x-y)=3(x-y)=3x-3y2(x-y)-8(y-x) =2(x-y)+8(x-y)=10(x-y)=10x-10yx(a-3)-(3-a) =x(a-3)+(a-3)=(a-3)(x+1)(x2-y2)-3(x+y)=(x+y)(x-y)-3(x+y)=(x+y)(x-y-3)