Question

this questions r for 50 points plz answer correct one if u don't know answer don't dare to touch my question no spamming report will be sent immediately plz understand tmrw I have exams and I need these answers ​

Answer 1

$\sqrt{72 } + \sqrt{800} - \sqrt{18} \\ = \sqrt{6} \times 6 \times 2 + \sqrt{20} \times 20 \times 2 - \sqrt{2} \times 3 \times 3 \\ = 6 \sqrt{2} + 20 \sqrt{2} - 3 \sqrt{2} \\ = 26 \sqrt{2} - 3 \sqrt{2} \\ = 23 \sqrt{2}$