tolong jawab .....ya!!!.....

1. 12√6-7√6+3√6
= √6(12-7+3)
= √6(8)
= 8√6
2. 6√5+√5-20√5
=√5(6+1-20)
=√5(-13)
= -13√5
3. √700+√180+√80-√721
=√(7.100)+√(36.5)+√(16.5)-√721
= 10√7+6√5+4√5-√721
= 10√7+10√5-√721
= 10(√7+√5)-√721
4. 2√150-3√54-√294+3√486
= 2√(25.6)-3√(9.6)-√(49.6)+3√(81.6)
= 10√6-9√6-7√6+27√6
=√6(10-9-7+27)
=√6(21)
=21√6
5. √12+√27+√75
=√(3.4)+√(3.9)+√(3.25)
=2√3+3√3+5√3
=√3(2+3+5)
=10√3
semoga membantu!