Question

de la 1 vreau b si de la 2 vreau a si b​

Answer 1

2. a) vei avea

$(- x )\times( - y)$

ai "-" cu "-", deci devine plus

$( - x) \times ( - y) = x \times y$

b) vei avea

$( - x) \times y$

ai "-" cu "+", deci devine minus

$( - x) \times y = - (x \times y)$

1. b)

$2 \div ( - 1) - ( - 3 + ( - 5 - 1) \div ( - 2))$

$2 \div ( - 1) = \frac{2}{ - 1} = - \frac{2}{1} = - 2$

paranteza 2:

$- 5 - 1 = - 6$

$\frac{ - 6}{ - 2} = \frac{6}{2} = 3$

$- 3 + 3 = 0$

= -2 * 0
= 0