Question

Qual o valor de A - B? * PORFAVOR

Answer 1

Resposta:

A-B = 18,7

Explicação passo-a-passo:

A = $(\frac{1}{6} )^{-2} . (\frac{1}{4} )^{-1} = 6^{2} . 4^{1} = 6 . 4 = 24$

B = $\sqrt\frac{49}{4} + (\sqrt{\frac{9}{25}}. \frac{3}{1})$

  = $\frac{\sqrt{49} }{\sqrt{4} } + (\frac{\sqrt{9} }{\sqrt{25} } .3)$

  = $\frac{7}{2} + (\frac{3}{5} . 3)$

  = $\frac{7}{2} + \frac{9}{5}$

  = $\frac{35+18}{10}$

  = $\frac{53}{10}$

A - B = $24- \frac{53}{10}$

         = $\frac{240}{10} - \frac{53}{10}$

         = $\frac{187}{10} = 18,7$