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(3 × 3√2 - 5 × 2√2 ) √3=
(9√2 - 10√2 ) √3 =
9√6 - 10√6 = -1√6 atau -√6
kalo salah mohon maaf yee
=(3√9x2-5√4x2)√3
=(3x3√2-5x2√2)√3
=(9√2-10√2)√3
=(-1√2)√3
maaf cuma bisa sampk situ, ndak tahu lanjutannya....