Question

Sejam X = 7/5 , Y = -35/-16 , Z = -13/4 , W = 1/-7

Calcule: W + { [ Y + X . (Y + Z))] . Z - W

Answer 1

$y + z = \frac{ - 35}{ - 16} + \frac{ - 13}{4} = \frac{35}{16} - \frac{13}{5} = \frac{175 - 208}{21} = - \frac{33}{80} \\ \\ - \frac{33}{80} \times \frac{7}{5} = - \frac{231}{400} \\ \\ - \frac{231}{400} + y = - \frac{231}{400} + \frac{35}{16} = \frac{161}{100} \\ \\ \frac{161}{100} \times z = \frac{161}{100} \times( - \frac{13}{4} )= - \frac{2093}{400}$

+ w - w = 0

resposta:

$- \frac{2093}{400}$