问题
解答题
化简 (1)(
(2)2
|
答案
(1)要使根式有意义,则a≥1,故原式=(a-1)+(a-1)+(1-a)=a-1.
(2)原式=2⋅
×6 33
×6 (
)23 2
=2⋅6 12
=2⋅6 33×(
)2×123 2
=2⋅6 33×
×4×332 22
=2×3=6.6 36
化简 (1)(
(2)2
|
(1)要使根式有意义,则a≥1,故原式=(a-1)+(a-1)+(1-a)=a-1.
(2)原式=2⋅
×6 33
×6 (
)23 2
=2⋅6 12
=2⋅6 33×(
)2×123 2
=2⋅6 33×
×4×332 22
=2×3=6.6 36