Do you need the answer from the quadratic formula? if so:

x^2=a
-3x=b
-18=c






Your answer would then be 6 and -3
These animals were raised in a controlled environment. Many plants are unable to survive in such a harsh environment. Heredity and environment are both important. Pollution is bad for the environment
I would guess it to be 'a' as most of the country is run by the government
Answer:
The resulting spectrum can be represented as relative intensity and ... In this paper, we focus on reviewing the data mining methods applied to ... for spectral classification as well as peculiar spectra identification are reviewed in Sects. ... of OB and K type stars in LAMOST are mis-classified as A and G type, ...