Question

exercițiul 2 și 3 ----​

Answer 1

2. a) $2\sqrt{3}+5\sqrt{3}-8\sqrt{3} = 8\sqrt{3}-8\sqrt3= 0$

b)$-\sqrt{5} +5\sqrt{5} -(-8\sqrt{5}) = 4\sqrt{5}+8\sqrt{5} = 12\sqrt{5}$

c) $0,5\sqrt{7}+5,5\sqrt{7}-9\sqrt{3} = 6\sqrt{7}-9\sqrt{3}$

3. a)$4\sqrt{3}+5\sqrt{7} -5\sqrt{3}+2\sqrt{7} = 7\sqrt{7}-\sqrt{3}$

b)$-42\sqrt{3} +15\sqrt{2}-18\sqrt{2}+9\sqrt{3} = -33\sqrt{3}-3\sqrt{2}$

c)$-2\sqrt{3} -(-\sqrt{12} -6\sqrt{3}) = -2\sqrt{3}+2\sqrt{3}+6\sqrt{3} = 4\sqrt{3} +2\sqrt{3}= 6\sqrt{3}$