问题
填空题
计算:(
|
答案
原式=
[3
+(10
-7
)][(3
-(10
-7
)],3
=
[(3
)2-(10
-7
)2],3
=
(10-7-3+23
),21
=6
.7
故答案为:6
.7
计算:(
|
原式=
[3
+(10
-7
)][(3
-(10
-7
)],3
=
[(3
)2-(10
-7
)2],3
=
(10-7-3+23
),21
=6
.7
故答案为:6
.7