Question

va rogggg ajutorrrr dau 55p si coroana​

Answer 1

4. a=(-8+5)-(-6+2)= -3-(-4)= -3+4=1

b=-16+13-(-2+1)=-3-(-1)=-3+1=-2

a) opusul este -1

b). a+b= 1+(-2)=1-2=-1

|a+b|=|-1|=1

5. [-7+(-4+11)]•[5-(6+7)]=

=(-7+7)•(5-13)=

=0•(-8)=0

6. a). a=|3-5|=|-2|=2

b=-(8-1)+2^3=-7+8=1

2>1, a>b

b). ab+ac-8=32, b+c=10

a(b+c)-8=32 |+8

a•10=40 |:10

a=4

a-(b+c)= 4-10=-6

7. 2^(2-x)=16

2^(2-x)=2^4

2-x=4 |-2

-x=2 |•(-1)

x=-2