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1. jawabanya 6 akar 6
2√3 x √18
=2√3 x √9x2
=2√3 x 3√2
=6√6
2. jawaban c
8√8 + 7√72 - √8
=8√4x2 + 7√9x8 - √4x2
=8.2√2 + 7.3√8 - 2√2
=16√2 + 21√4x2 - 2√2
=16√2 + 21.2√2 - 2√2
=16√2 + 42√2 - 2√2
=56√2