问题
解答题
把下列各式化成最简二次根式(a>0,b>0). (1)
(2)(
|
答案
(1)原式=2
+3a•6a
-6a 3a 2a2× 3 a
=2
+6a
-6a 6a
=2
;6a
(2)原式=(
×32 3
-ab×2ab
)×2ab ab 2 a
=(2
-2ab
)×2ab 2 a
=
×2ab 2 a
=2ab× 2 a
=2
.b
把下列各式化成最简二次根式(a>0,b>0). (1)
(2)(
|
(1)原式=2
+3a•6a
-6a 3a 2a2× 3 a
=2
+6a
-6a 6a
=2
;6a
(2)原式=(
×32 3
-ab×2ab
)×2ab ab 2 a
=(2
-2ab
)×2ab 2 a
=
×2ab 2 a
=2ab× 2 a
=2
.b