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= 3 akar 2 + 2 akar 4×2 - akar 16×2 + akar 25×2 - akar 36×2
= 3 akar 2 + 2×2 akar 2 - 4 akar 2 + 5 akar 2 - 6 akar 2
=3 akar 2 + 4 akar 2 - 4 akar 2 + 5 akar 2 - 6 akar 2
= 2 akar 2