Resposta :
Resposta:
Olá
< var > DE - FG = 6\sqrt2 - 9\sqrt2 = -3\sqrt2 < /var ><var>DE−FG=62−92=−32</var>
< var > DE+ FG = 6\sqrt2 + 9\sqrt2 = 15\sqrt2 < /var ><var>DE+FG=62+92=152</var>
< var > \frac{DE-FG}{DE+FG}=\frac{-3\sqrt2}{15\sqrt2}=-\frac15 < /var ><var>DE+FGDE−FG=152−32=−51</var>