问题
解答题
当x=2
|
答案
(
-1 x-3
)•(x+3)=x-2 x2-9
•(x+3)=5 x2-9
,5 x-3
当x=2
时,原式=2
=5 x-3
=-105 2
-32
-15.2
当x=2
|
(
-1 x-3
)•(x+3)=x-2 x2-9
•(x+3)=5 x2-9
,5 x-3
当x=2
时,原式=2
=5 x-3
=-105 2
-32
-15.2