Răspuns :
aducem la acelasi numitor in paranteze 140 la prima este numitorul comun, iar la a2a 6
(48-49)/140 * (-6-1)/6=
= (-1/140) * ( -7/6)=
= 1/20 * 1/6= 1/120
(48-49)/140 * (-6-1)/6=
= (-1/140) * ( -7/6)=
= 1/20 * 1/6= 1/120
[tex]( \frac{12}{35} - \frac{7}{20}) * (-1 - \frac{1}{6}) = ( \frac{48}{140} - \frac{49}{140} ) * ( \frac{-6 - 1}{6} ) =[/tex]
= [tex] \frac{-1}{140} * \frac{-7}{6} = \frac{1}{20 * 6} = \frac{1}{120} [/tex]