Question

va rog, urgent!!!!! ​

Answer 1

Răspuns:

$i)((( - \frac{2}{35} + \frac{3}{14} ) - ( \frac{33}{35} - \frac{3}{2} ) + ( - 2 - \frac{5}{14} + \frac{12}{7} )) + \frac{8}{35} ) \div ( - \frac{3}{10} ) = \\ = ((( - \frac{2 \times 2}{70} + \frac{3 \times 5}{70} ) - ( \frac{33 \times 2}{70} - \frac{3 \times 35}{70} ) + ( \frac{ - 2 \times 14}{14} - \frac{5}{14 } + \frac{12 \times 2}{14} ) ) + \frac{8}{35}) \div ( - \frac{3}{10} ) = \\ = ((( \frac{ - 4}{70} + \frac{15}{70} ) - ( \frac{ {66} }{70} - \frac{105}{70} ) + ( \frac{ - 28}{14} - \frac{5}{14} + \frac{24}{14} )) + \frac{8}{35} ) \div ( - \frac{3}{10} ) = \\ = (( (\frac{11}{70} - ( - \frac{39}{70} ) + ( - \frac{9}{14} )) + \frac{8}{35} ) \div ( - \frac{3}{10} ) = \\ = (( \frac{11}{70} + \frac{39}{70} - \frac{9}{14} ) + \frac{8}{35} ) \div ( - \frac{3}{10} ) = \\ = ( (\frac{50}{70} - \frac{9 \times 5}{70} ) + \frac{8 \times 2}{70} ) \div ( - \frac{3}{10} ) = \\ = (( \frac{50}{70} - \frac{45}{70} ) + \frac{16}{70} ) \div ( - \frac{3}{10} ) = \\ = ( \frac{5}{70} + \frac{16}{70} ) \div ( - \frac{3}{10} ) = \\ = \frac{21}{70} \times ( - \frac{10}{3} ) = \frac{210}{ - 210} = - 1$

Sper sa nu fi greșit la calcule și pune te rog parantezele corect eu nu am cum sa le pun.