Question

O valor da expressão [-7 + 8 :(15 - V25)]: 9 é:​

Answer 1

Resposta:

$\frac{[-7+(\frac{8}{15-\sqrt{25}})]}{9}\\\\\frac{[-7+\frac{8}{15-5}]}{9}\\\\\frac{[-7+\frac{8}{10}]}{9}\ Dividindo\ 8\ e\ 10\ por\ 2.\\\\\frac{[-7+\frac{4}{5}]}{9}\ Tirando\ o\ MMC,\ temos:\\\\\frac{[\frac{5*(-7)+4}{5}]}{9}\\\\\frac{[\frac{-35+4}{5}]}{9}\\\\\frac{\frac{-31}{5}}{9}\ Multiplicando\ \frac{-31}{5}\ pelo\ inverso\ de\ 9 =\frac{1}{9},\ obtemos: \\\\\frac{-31}{5}*\frac{1}{9}\\\\\frac{-31}{45}=-0,68888...$