Question

5 raíz de 45 + 3raiz de 5 - 2raiz de 125

Answer 1

$5 \sqrt{45}+3 \sqrt{5}-2 \sqrt{125}=\\5 \sqrt{3^2.5}+3 \sqrt{5}-2 \sqrt{5^2.5}=\\5.3 \sqrt{5}+3 \sqrt{5}-2.5 \sqrt{5}=\\15 \sqrt{5}+3\sqrt{5}-10\sqrt{5}=\\15+3-10\sqrt{5}=\\18-10\sqrt{5}=\\8\sqrt{5}$