Hasil2√50+9√8-(12√18+4√32) adalah

[tex]2 \sqrt{50} + 9 \sqrt{8} - (12 \sqrt{18} + 4 \sqrt{32} ) \\ = 2 \sqrt{25 \times 2} + 9 \sqrt{4 \times 2} - (12 \sqrt{9 \times 2} + 4 \sqrt{16 \times 2} ) \\ = 2 \times 5 \sqrt{2} + 9 \times 2 \sqrt{2} - (12 \times 3 \sqrt{2} + 4 \times 4 \sqrt{2} ) \\ = 10 \sqrt{2} + 18 \sqrt{2} - (36 \sqrt{2} + 16 \sqrt{2}) \\ = 28 \sqrt{2} - 52 \sqrt{2 } \\ = - 24 \sqrt{2} [/tex]

12√9*2= 36√2
4√16*2= 16√2
= 36√2+ 16√2= 52√2

2√25*2 + 9√4*2- 20√2=
10√2+18√2 = 28√2-52√2= -24√2