Question

因式分解 (x²+x+2)(X^2-2x+2)-4x² （a-a/a+1）÷a²-2a/a²-4×a+1/a²+3a+2

还有[2/3x-2/x+y（x+y/3x-x-y)]÷x-y/x
急呀急呀，急求呀~~~~~~~~~~~~~~~~我补分一般都比较高，所以，就拜托各位了。
好吧，再来。（a - a/a+1）÷a²-2a/a²-4 × a+1/a²+3a+2
[2/3x - 2/x+y（x+y/3x - x-y)]÷ x-y/x

Answer 1

你的分子、分母部分分界不够清晰啊

Answer 2

1. (x2+x+2)(X^2-2x+2)-4x2=(x2+2+x)(x2+2-2x)-4x2
=(x2+2)2-(x2+2)x-2x2-4x2
=x4-x3-2x2-2x+4
=x3(x-1)-2x2+2x-2x-2x+4
=x3(x-1)-2x(x-1)-4(x-1)
=(x-1)(x3-2x-4)
=(x-1)(x3-8-2x+4)
=(x-1)〔(x-2)(x2+2x+4)-2(x-2)〕
=(x-1)(x-2)(x2+2x+2)
2、3.看不清分子分母