问题
填空题
化简:
|
答案
=2x-2 1-x2
=-2(x-1) -(x+1)(x-1)
,2 x+1
-4m2-3mn mn 3m2+2mn nm
=4m2-3mn-3m2-2mn mn
=m2-5mn mn
=
,m-5n n
故答案为:-
,2 1+x
.m-5n n
化简:
|
=2x-2 1-x2
=-2(x-1) -(x+1)(x-1)
,2 x+1
-4m2-3mn mn 3m2+2mn nm
=4m2-3mn-3m2-2mn mn
=m2-5mn mn
=
,m-5n n
故答案为:-
,2 1+x
.m-5n n