Question

qual numero esta errado 5 (-1/4)^3-(-1/4)^2 -(-1/4)^2= 5[-1/64+1/16] + 1/16= - 5/64 +1/16 +1/16= -5+4+4/64= 3/64

Answer 1

$5(- \frac{1}{4} )^3-(- \frac{1}{4})^2-(- \frac{1}{4} )^2= \\ \\ 5(-\frac{1}{64} )-(+ \frac{1}{16} )-(+ \frac{1}{16)} = \\ \\ - \frac{5}{64} - \frac{1}{16} - \frac{1}{16} = \\ \\ \frac{-5-4-4}{64} =- \frac{13}{64} \\ \\ \\ (- \frac{1}{4} )^2=(- \frac{1}{4})(- \frac{1}{4} )=+ \frac{1}{16} \\ \\ Ou~~base ~~negativa~~expoente~~par~~resultado~~positivo$