Question

12root18-6root20-3root50+8root45

Answer 1

$12 \sqrt{18} - 6 \sqrt{20} - 3 \sqrt{50} + 8 \sqrt{45} \\ = 12 \times 3 \sqrt{2} - 6 \times 2 \sqrt{5} - 3 \times 5 \sqrt{2} + 8 \times 3 \sqrt{5} \\ = 36 \sqrt{2} - 12 \sqrt{5} - 15 \sqrt{2} + 24 \sqrt{5} \\ = 21 \sqrt{2} + 12 \sqrt{5}$

Answer 2

this is a answer
first we need to split root no and then we solve easily
ok bye