Question

4√63-√7

efetue e simplifique

Answer 1

4√63 - √7
4.3√7 - √7
12√7 - √7
= 11√7

R.: 11√7
_______________________
63: 3
21: 3
7: 7
1      =   3.3.7 = √9.√7 = 3√7

Answer 2

.
$4 \sqrt{63} - \sqrt{7} = \\ \\ 4 \sqrt{3^2.7} - \sqrt{7} = \\ \\ 4.3 \sqrt{7} - \sqrt{7} = \\ \\ 12 \sqrt{7} - \sqrt{7} = \\ \\ 11 \sqrt{7}$