Question

simplify. both of them please

Answer 1

1.
$\sqrt{45} - 3\sqrt{20} + 4 \sqrt{5} \\ \sqrt{9 \times 5} - 3 \sqrt{4 \times 5} + 4 \sqrt{5} \\ 3 \sqrt{5} - 6 \sqrt{5} + 4 \sqrt{5} \\ (3 - 6 + 4) \sqrt{5} \\ \sqrt{5}$
2.
$3 \sqrt{45} - \sqrt{125} + \sqrt{200} - \sqrt{50} \\ 3 \sqrt{9 \times 5} - \sqrt{25 \times 5} + \sqrt{100 \times 2} - \sqrt{25 \times 2} \\ 9 \sqrt{5} - 5 \sqrt{5} + 10 \sqrt{2} - 5 \sqrt{2} \\ (9 - 5) \sqrt{5} + (10 - 5) \sqrt{2} \\ 4 \sqrt{5} + 5 \sqrt{2}$
Hope this helps you:-))))
don't forget to do it brainleist.