Question

3✓5 + ✓5
5✓7 - 2✓7

Answer 1

$\huge\red {\mid {\fbox{\tt {hola}}\mid}}$

$3\sqrt{5} + \sqrt{5} = 3 \sqrt{5} +1 \sqrt{5} = (3 + 1) \sqrt{5} = 4 \sqrt{5}$

$5 \sqrt{7} - 2 \sqrt{7} = (5 - 2) \sqrt{7} = 3 \sqrt{7}$