Question

Ayuda urgente porfavir ​

Answer 1

$(\frac{11}{12} )^{-2} =( \frac{12}{11} )^2 = 144/121\\\\\\-(-\frac{15}{3} )^2 = -(-5)^2= -25\\\\\\\\(\frac{4}{5})^{-3} = (\frac{5}{4})^{3} = \frac{125}{64}\\\\\\ (\frac{6}{7})^{-3} = (\frac{7}{6})^{3} = \frac{343}{126}$