考點(diǎn):二次根式的乘除法
專題:
分析:(1)根據(jù)二次根式的乘法運(yùn)算直接得出即可;
(2)根據(jù)二次根式的乘法運(yùn)算直接得出即可;
(3)根據(jù)二次根式的乘法運(yùn)算進(jìn)而化簡(jiǎn)得出即可;
(4)根據(jù)二次根式的乘法運(yùn)算直接得出即可;
(5)根據(jù)二次根式的乘法運(yùn)算直接得出即可;
(6)根據(jù)二次根式的乘法運(yùn)算直接得出即可;
(7)根據(jù)二次根式的乘法運(yùn)算進(jìn)而化簡(jiǎn)得出即可;
(8)根據(jù)二次根式的乘法運(yùn)算進(jìn)而化簡(jiǎn)得出即可;
(9)根據(jù)二次根式的乘法運(yùn)算進(jìn)而化簡(jiǎn)得出即可;
(10)根據(jù)二次根式的乘法運(yùn)算進(jìn)而化簡(jiǎn)得出即可.
解答:解:(1)
×=10;
(2)4
×(-3
)=-12×4=-48;
(3)
×
(a≥0)=3a
2;
(4)
×
=9;
(5)
×
×
=
×
,
=
×6×2
=4
;
(6)
•
(m≥0)
=
=4m;
(7)
•
(a≥0,b≥0)
=
=15a
2b;
(8)
×
=
=6
;
(9)
×
=
=
=2
;
(10)
•
(x≥0,y≥0)=
=2xy
2.
點(diǎn)評(píng):此題主要考查了二次根式的乘法運(yùn)算,正確化簡(jiǎn)二次根式是解題關(guān)鍵.