Bantu ya no 2 pake cara

Bantu ya no 2 pake cara

A) (2 x -3/4) – (5 x -1/2) + (3 x -1/5) = (-6/4) – (-5/2) + (-3/5) = (-30/20) – (-50/20) + (-12/20) = 8/20 = 2/5

$a. : 2x - 5y + 3z \ = 2( frac{ - 3}{4} ) - 5( frac{ - 1}{2} ) + 3( frac{ - 1}{5} ) \ = frac{ - 6}{4} + frac{5}{2} - frac{3}{5} \ = frac{ - 30 + 50 - 12}{20} \ = frac{ - 8}{20} \ = frac{ - 2}{5}$
$b. : 2xy - 2xz + 2yz \ = 2( frac{ - 3}{4} )( frac{ - 1}{2} ) - 2( frac{ - 3}{4} )( frac{ - 1}{5} ) + 2( frac{ - 1}{2} )( frac{ - 1}{5} ) \ = frac{6}{8} - frac{6}{20} + frac{2}{10} \ = frac{60 - 24 + 16}{80} \ = frac{52}{80} \ = frac{13}{20}$