Răspuns:
a.
[tex] 15 \sqrt{7} [/tex]
c.
[tex]7 \sqrt{5} - 2 \sqrt{5} = 5 \sqrt{5} [/tex]
b.
[tex]20 \sqrt{2} + 3 \sqrt{5} = 23 \sqrt{5} [/tex]
d.
[tex]5 \sqrt{3 } - 3 \sqrt{3} = 2 \sqrt{3} [/tex]
a.
[tex]3 \sqrt{11} + 7 \sqrt{11} - 10 \sqrt{11} = 10 \sqrt{11} - 10 \sqrt{11} = 0[/tex]
b.
[tex]2 \sqrt{2} + 4 \sqrt{2} - \sqrt{2} = 6 \sqrt{2} - \sqrt{2} = 5 \sqrt{2} [/tex]
c.
[tex]32 \sqrt{6} - 2 \sqrt{6} = 30 \sqrt{6} [/tex]
d.
[tex] - 17 \sqrt{7} + 3 \sqrt{7} = - 14 \sqrt{7} [/tex]
