Question

vă rooog urgentttt!!!!! dau coroană !!!!!!!! ex 1,2,3,4!!!!!!!!!! va rooooooòooooogggggg​

Answer 1

1. a) a-(b-c)= -17-(4+11)

=-17-15

=-32

b) -4-(-3+2)

=-4+1

=-3

2. a) -7-[-3-10+1)]+5

=-7-(-12)+5

=-7+12+5

=-7+17

=10

b) -[-31-26+14]-(-9)

=-(-57+14)+9

=-(-43)+9

=43+9

=52

3. -7+11+5= 4+5= 9

b) -4+(-10-2)

=-4-12

=-16

4. Cazul 1: Ambele pozitive

x+x-2=0

2x=2=>x=1

Cazul 2: Ambele negative

-x-(x-2)=0

-2x=-2

x=1

Cazul 3: prima poz a doua negativa

x-(x-2)=0

imposibil

Cazul 4: prima neg a doua poz

-x+x-2=0

imposibil