• Matéria: Matemática
  • Autor: bery
  • Perguntado 9 anos atrás

g
-2×(-1)+3×(-2)+[1×(-1)-(-1+7)]=
       5  4                 5      10
      



h [-2×(-3)²+4]÷(-2)²-3÷(-3+1)²=
           2               4   2   2




Respostas

respondido por: MATHSPHIS
1
g)
-2*(\frac{-1}{5})+\frac{3}{4}*(-2)+[1*(-\frac{1}{5})-(-1+7)]=\\
\\
\frac{2}{5}-\frac{3}{2}+[-\frac{1}{5}-6]=\\
\\
\frac{2}{5}-\frac{3}{2}-\frac{31}{5}=\\
\\
\frac{4-15-62}{10}=-\frac{73}{10}

h)
[-2*(-\frac{3}{2})^2+4] \div(-\frac{2}{4})^2-\frac{3}{2} \div (-\frac{3}{2}+1)^2=\\
\\
(-2*\frac{9}{4}+4) \div\frac{1}{4}-\frac{3}{2}\div (-\frac{1}{2})^2=\\
\\
(-\frac{9}{2}+4) \div \frac{1}{4}-\frac{3}{2}\div \frac{1}{4}=\\
\\
-\frac{1}{2} \div \frac{1}{4}-\frac{3}{2}\div \frac{1}{4}=\\
\\
-\frac{1}{2}*\frac{4}{1}-\frac{3}{2}*\frac{4}{1}=\\
\\
-2-6=-8
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