Question

por favor es urgente es una tarea para hoy :'( ​

Answer 1

Respuesta:

$\frac{12}{7}(-\frac{5}{36})(\frac{21}{4}) =1(-\frac{5}{3})(\frac{3}{4} )=1 (-\frac{5}{1})(\frac{1}{4} )=-\frac{5}{4} \\\\\\-\frac{21}{8} (5 -\frac{3}{7} )=-\frac{21}{8} (\frac{(7)(5)-(1)(3)}{7})=-\frac{21}{8} (\frac{35-3}{7} ) =-\frac{21}{8}(\frac{32}{7} )= -\frac{3}{1} (\frac{4}{1} ) = 12\\\\\\\frac{14}{3} (-\frac{1}{7})-\frac{1}{6}(\frac{9}{8} )= \frac{2}{3}(-1)-\frac{1}{2}(\frac{3}{8} )=-\frac{2}{3} - \frac{3}{16} = \frac{-(16)(2)-(8)(3)}{48} = \frac{-32-24}{48}= \frac{-56}{48}= -\frac{7}{6}$

$\frac{3}{8}(-\frac{20}{9} )(\frac{-9}{10} )( \frac{-5}{18} )=\frac{1}{4}(\frac{-10}{3} )(\frac{-1}{2} ) (\frac{-1}{2} )=\frac{1}{2}(\frac{-5}{3})( \frac{-1}{2} ) (\frac{-1}{2} )=\frac{-5}{24} \\\\\\(\frac{7}{15} -\frac{4}{3} )(\frac{-2}{5}+\frac{3}{7})=(\frac{(1)(7)-(5)(4)}{15} )(\frac{(7)(-2)+(5)(3)}{35)}=(\frac{7-20}{15})(\frac{-14+15}{35} )=(\frac{-13}{15} )(\frac{1}{35} )=\frac{-13}{525}$

Espero sea de ayuda!