8 akar 2 – 2 akar 2 – akar 18 adalah…

8√2-2√2-√18
= 8√2-2√2-√9.2
= 8√2-2√2-3√2
= (8-2-3).√2
= 3√2

8√2 – 2√2 – √18 = 8√2 – 2√2 – √9×2 = 8√2 – 2√2 – 3√2 = 3√2