tolong pake cara,no asl,lgi butuh banget

Materi bentuk akar.........

1. 12√6 - 7√6 + 3√6 = (12 - 7 + 3)√6 = 8√6
2. 6√5 + √5 - 20√5 = (6 + 1 - 20)√5 = -13√5
3. √700 + √180 + √80 = √(100x7) + √(36 x 5) + √(16 x 5)
                                   = 10√7 + 6√5 + 4√5
                                   = 10√7 + (6 + 4)√5
                                   = 10√7 + 10√5
                                   = 10(√7 + √5)
4.
2√150 - 3√54 - √294 + 3√486
= 2(√(25 x 6)) - 3(√(9x6)) - √(49 x 6) + 3(√(81 x 6))
= 2 (5√6) - 3(3√6) - 7√6 + 3(9√6)
= 10√6 - 9√6 - 7√6 + 27√6
= (10 - 9 - 7 + 27)√6
= 21√6

5. √12 + √27 + √75 = √(4 x 3) + √(9 x 3) + √(25 x 3)
                               = 2√3 + 3√3 + 5√3
                               = (2 + 3 + 5)√3
                               = 10√3