Question

Simplifique os radicais e efetue as operações.

a)
$\sqrt{98 } + 5 \sqrt{18}$
b)
$3 \sqrt{98} - 7 \sqrt{50}$
c)
$\sqrt{12} - 6 \sqrt{3}$
d)
$\sqrt{20} - \sqrt{45}$
​

Answer 1

Resposta:

a) $\sqrt{98}+5\sqrt{18}=7\sqrt{2}+15\sqrt{2}=22\sqrt{2}$

b) $3\sqrt{98}-7\sqrt{50}=21\sqrt{2}-35\sqrt{2}=-14\sqrt{2}$

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

d) $\sqrt{20}-\sqrt{45}=2\sqrt{5}-3\sqrt{5}=-1\sqrt{5} \\ou\\-\sqrt{5}$