Question

me Ajude e pra amanha​

Answer 1

Resposta:

c)

x+y

x-y

4+2÷4-2

6÷2= 3

d) a=2 b=-10 c=12

x=10+/- √-10^2-4.2.12/2

x=10+/- √ 100-96/2

x=10+/- √4/2

x'=10+2/2= 6

x"= 10-2/2= 4