Question

Recede dau coroana, doar ex 6

Answer 1

Răspuns:

6, a) ( $\frac{-5*2+ 9*3}{42}$) : (- $\frac{2*7+3}{7}$)  + ( $\frac{-3*3+ 4*2}{24}$) :( - $\frac{1*8+7}{8}$) =

$\frac{-10+27}{42}$ * (- $\frac{7}{17}$)  + $\frac{-9+ 8}{24}$ * (-$\frac{8}{15}$) = $\frac{17}{42}$ * (- $\frac{7}{17}$) + $\frac{-1}{24}$ *( $- \frac{8}{15}$)= - $\frac{1}{6}$ + $\frac{1}{45}$= $\frac{-15 +2}{90}$= -$\frac{13}{90}$

b) ($\frac{-5*3+ 4*4}{36}$) * (-$\frac{4*2+1}{2}$) - ( $\frac{-1 -1*3}{18}$) * $\frac{8*3+3}{8}$=

$\frac{-15+16}{36}$ * ( - $\frac{9}{2}$) - ( $\frac{-1-3}{18}$) * $\frac{27}{8}$   = $\frac{1}{36}$ * $-\frac{9}{2}$  - ( $-\frac{4}{18}$) * $\frac{27}{8}$ =

- $\frac{1}{8}$  - (-$\frac{3}{4}$) = $\frac{-1+3*2}{8}$= $\frac{5}{8}$