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Remember completing the square gives a result of the form (x+q)² + p where q and p are numbers
Also q is always half of the x term, which in this case is -4, as such q = -2
Substituti...

Atoms are the smallest particle of matter that cannot be divided and have a nucleus which contains protons and neutrons with electrons surrounding it in energy levels.

The 4 chambers of the heart are: Right atrium,Right ventricle,Left atrium and left ventricle.

The perfect tense can be constructed as follows: Subject + auxiliary verb + past participle. For example, 'ich habe gelesen' (I have read).

As birds are a motile organism, we would use the mark-release-recapture method. First, capture a sample of individuals (possibly through mist netting), mark them (e.g. a wing tag or leg ring) and release....