Question

Ex. din imagine, vă rog ! Mulțumesc mult !!

Answer 1

Explicație pas cu pas:

a)

$\Big( \frac{1}{4} + \frac{9}{4} \Big) \cdot \Big( - \frac{4}{5}\Big) = \frac{10}{4} \cdot \Big( - \frac{4}{5}\Big) = \bf - 2$

b)

$\Big( \frac{9}{16} + \frac{25}{4} - \frac{361}{64}\Big) \cdot \Big( - \frac{4}{3}\Big) = \frac{36 + 400 - 361}{64} \cdot \Big( - \frac{4}{3}\Big) = - \frac{75}{64} \cdot \frac{4}{3} = \bf - \frac{25}{16}$

c)

$\Big[{\Big( \frac{17}{5} \Big)}^{2} - {\Big( \frac{8}{5} \Big)}^{2} - 4\Big] \cdot \frac{1}{5} = \Big(\frac{289}{25} - \frac{64}{25} - \frac{100}{25} \Big) \cdot \frac{1}{5} = \frac{289 - 64 - 100}{25} \cdot \frac{1}{5} = \frac{125}{25} \cdot \frac{1}{5} = 5 \cdot \frac{1}{5} = \bf 1$

Answer 2

raspunsurile sunt aici