1) 9·√6-14·√6-√6=√6·(9-14-1)=√6·6=6·√6
2) 0.9·√6+1.5·√a-0.4·√6-√a=√6·(0.9-0.4)+√a·(1.5-1)=√6·0.5+√a·0.5=0.5·(√6+√a)
3)
-
+
=9·√c-4·√c+10·√c=√c·(9-4+10)=√c·15=15·√c
4) √48-√75+√27=4·√3-5·√3+3·√3=√3·(4-5+3)=√3·2=2·√3
5)5·√45-2·√125+3·√20=5·3·√5-2·5√5+3·2·√5=√5·(15-10+6)=√5·11=11·√5
6)(4·√6)·(4+√6)=16√6+24
7)(
-5)·(5+
)=5·
+3x-25-5·<span>
=3x-25
8)(4a-2</span>·√6<span>)</span>·(4a+2·√6)=16x²+8a·√6-8a·√6-24=16x²-24