问题
填空题
已知
|
答案
由已知
-1 a
=5,得a-b=-5ab,1 b
则
=2a+3ab-2b a-2ab-b
=2(a-b)+3ab (a-b)-2ab
=-10ab+3ab -5ab-2ab
=1.-7ab -7ab
已知
|
由已知
-1 a
=5,得a-b=-5ab,1 b
则
=2a+3ab-2b a-2ab-b
=2(a-b)+3ab (a-b)-2ab
=-10ab+3ab -5ab-2ab
=1.-7ab -7ab