问题
解答题
计算: (1)2
(2)
(3)
(4)(
|
答案
(1)2
+103
-63
=63
;3
(2)
÷a(a-1)
=a-1 a
=|a|a(a-1)• a a-1
(3)
=412-402
=9.;(41-40)(41-40)
(4)原式=(
)•(-a)b a
•(-2abbx x2
)=2ab2.x a
计算: (1)2
(2)
(3)
(4)(
|
(1)2
+103
-63
=63
;3
(2)
÷a(a-1)
=a-1 a
=|a|a(a-1)• a a-1
(3)
=412-402
=9.;(41-40)(41-40)
(4)原式=(
)•(-a)b a
•(-2abbx x2
)=2ab2.x a