问题
解答题
计算:
|
答案
÷x2-2x+1 x2-x x2-1 2x
=
÷(x-1)2 x(x-1) (x-1)(x+1) 2x
=
×x-1 x 2x (x-1)(x+1)
=
;2 x+1
当x=-
时,3 2
原式=
=-4.2 -
+13 2
计算:
|
÷x2-2x+1 x2-x x2-1 2x
=
÷(x-1)2 x(x-1) (x-1)(x+1) 2x
=
×x-1 x 2x (x-1)(x+1)
=
;2 x+1
当x=-
时,3 2
原式=
=-4.2 -
+13 2