Question

Calcule o valor das expressões

Answer 1

$a) (-\frac{1}{2})^2+\frac{3}{4}=\frac{1}{4}+\frac{3}{4}=\frac{4}{4}=1 \\\\ b) (-\frac{3}{2})^2+3.(-\frac{1}{2})^3=\frac{9}{4}+3.(-\frac{1}{8} )=\frac{9}{4}-\frac{3}{8} =\frac{18-3}{8} =\frac{15}{8}$