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√18=√9x2=3√2
= 7√2+3√2=10√2
4. jawab = 13√3 (A) alasan 2√27=2√9x3=6√3
=4√3+6√3+3√3=13√3
5. jawab = 3 (D) alasan √5 x √5 = 5 dan √2 x -√2 = -2 jadi 5-2 = 3
6. jawab = -34√7 (E) alasan 2√175=2√25x7=10√7
5√343=5√49x7=35√7
√63=√9x7=3√7
3√112=3√16x7=12√7
10√7-35√7+3√7-12√7= -34√7
9.jawab = 2( √3+√2 ) (C) Alasan 2/√3-√2 dikali √3+√2/√3+√2
2 ( √3+√2 ) / 3-2 = 2( √3+√2 )
untuk yang nomer 10 maaf gx bisa,saya lupa caranya,kalau ada kesalahan mohon dimaafkan dan semoga bermanfaat,Jangan lupa jadikan jawaban terbaik ok broo!!!!