Question

Efetuem pra mim por favor

Answer 1

Resposta:

a)  $5\sqrt{7} + 3\sqrt{7} = (5+3)\sqrt{7}\\(5+3)\sqrt{7} = 8\sqrt{7}$

b)$4\sqrt{5} - 2\sqrt{5} = (4-2)\sqrt{5}\\(4-2)\sqrt{5} = 2\sqrt{5}$

c)$2\sqrt[3]{9} +3\sqrt[3]{9} = (2+3)\sqrt[3]{9} \\ (2+3)\sqrt[3]{9} =5\sqrt[3]{9}$

d)$\sqrt{5} - \sqrt{5} - \sqrt{5} = -\sqrt{5}$

e)$5\sqrt{2} -3\sqrt{2} + 2\sqrt{2} = (5-3+2)\sqrt{2}\\(5-3+2)\sqrt{2} = 4\sqrt{2}$

f)$8\sqrt{3} - 2\sqrt{3} - 8\sqrt{3} + \sqrt{3} = (8-2-8+1)\sqrt{3} \\(8-2-8+1)\sqrt{3} = -\sqrt{3}$