a)
[tex] - 9 \times ( - \frac{3}{7} ) \div (1 \frac{1}{2} ) \times 2 = - 9 \times ( - \frac{3}{7} ) \div ( \frac{3}{2} ) \times 2 = - 9 \times ( - \frac{3}{7} ) \times ( \frac{2}{3} ) \times 2 = - 9 \times ( - \frac{1}{7} ) \times (\frac{2}{1} ) \times 2 = -9 \times( - \frac{2}{7} ) \times 2 = \frac{18}{7} \times 2 = \frac{36}{7} = 5 \frac{1}{7} [/tex]
b)
[tex]( - 7.7 - ( - 9) \times (0.3))^{2} = ( - 7.7 - ( - 2.7)) ^{2} = (- 7.7 + 2.7) ^{2} = ({ - 5})^{2} = 25[/tex]
Myślę że pomogłem ;)
