Question

{raiz quadrada de 81:[-5-2.(-1)]. raiz quadrada de 100}:15,QUERO A CONTA,a resposta dá=-2

Answer 1

$\{\sqrt{81} \div[-5-2(-1)]\times\sqrt{100} \}\div15=\\ \{9\div(-5+2)\times10\}\div15=\\ \{9\div(-3)\times10\}\div15=\\ \{-3\times10\}\div15=\\ (-30)\div15=-2$

Answer 2

= { 9 : [ - 5 + 2 ] . 10 } : 15

= { 9 : [ - 3 ] . 10 } : 1'5

= { - 3 . 10 } : 15

= - 30 : 15

= - 2......(resposta)