Question

ajutatima va rog urgent;
calculati;
-2,intreg 3/7inmultit2,4/5+(-2,3/7 )inmultit4,1/8

Answer 1

2 intreg3/7=(2x7+3)/7=17/7
2 intreg 4/5=(2x5+4)/5=14/5
4 intreg 1/8=(4x8+1)8=33/8
-17/7x14/5+(-17/7)x33/8=
-17/7x(14/5+33/8)=
-17/7x[(14x8+33x5)/40]=
-17/7x[(112+165)/40]=
-17/7x277/40=-4709/280

Answer 2

 $-\frac{17}{7}\cdot(\frac{14}{5}+\frac{33}{8})=-\frac{17}{7}\cdot\frac{5*14+3*33}{40}=\;-\;\frac{17}{7}\cdot\frac{169}{40}=...$