问题
解答题
化简求值:
|
答案
∵a=2+
>0,b=2-3
>0,3
∴a+b=4,ab=1,
∴原式=
+
(a
+a
)b
(b
+a
)b
(b
-a
)b
(a
-a
)b
=
+a b b a
=
+ab b ab a
=a+b ab
,ab
当a+b=4,ab=1,原式=
×4 1
=4.1
化简求值:
|
∵a=2+
>0,b=2-3
>0,3
∴a+b=4,ab=1,
∴原式=
+
(a
+a
)b
(b
+a
)b
(b
-a
)b
(a
-a
)b
=
+a b b a
=
+ab b ab a
=a+b ab
,ab
当a+b=4,ab=1,原式=
×4 1
=4.1