5 √32 - √98-2√50+3√2 =

5√32 - √98 - 2√50 + 3√2
= 5 √ (16×2) - √(49×2) - 2√(25 × 2) + 3√2
= (5×4) √2 - 7√2 - (2×5)√2 + 3√2
= 20√2 - 7√2 - 10√2 + 3√2
=(20-7-10+3)√2
=6√2

Penyelesaian :

[tex]5 \sqrt{32} - \sqrt{98} - 2 \sqrt{50} + 3 \sqrt{2} \\ = 5 \sqrt{16 \times 2} - \sqrt{49 \times 2} - 2 \sqrt{25 \times 2} + 3 \sqrt{2} \\ = 20 \sqrt{2} - 7 \sqrt{2} - 10 \sqrt{2} + 3 \sqrt{2} \\ = (20 - 7 - 10 + 3) \sqrt{2} \\ = 6 \sqrt{2} [/tex]

Good Luck :)
Selamat Belajar !