Question

qual e a raiz quadrada de √15-√32+√25-√81 ?

Answer 1

=3,87-5,65+5-9
=-6,78

Answer 2

 Olá Rycharlles,
boa noite!

 Fatorando,

$\sqrt{15}-\sqrt{32}+\sqrt{25}-\sqrt{81}=\\\\\sqrt{3\cdot5}-\sqrt{2^5}+\sqrt{5^2}-\sqrt{3^4}=\\\\\sqrt{15}-2^2\sqrt{2^1}+5^1\sqrt{5^0}-3^2\sqrt{3^0}=\\\\\sqrt{15}-4\sqrt{2}+5-9=\\\\\boxed{\sqrt{15}-4\sqrt{2}-4}$