(1)化简:(
(2)计算:
|
原式=[
-4 a(a-2)
]×a2 a(a-2) a a+2
=
×(2-a)(2+a) a(a-2) a a+2
=-1;
原式=2
+(32
-22
)÷3 6
=2
+2
-3 2
=
+2
.3
(1)化简:(
(2)计算:
|
原式=[
-4 a(a-2)
]×a2 a(a-2) a a+2
=
×(2-a)(2+a) a(a-2) a a+2
=-1;
原式=2
+(32
-22
)÷3 6
=2
+2
-3 2
=
+2
.3