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How can do you factorize the equation x^2+6x+8

Here, we see that the term in x in the equation is 6, so we start by looking for a perfect square where the second term would be 6 : we get 6/2 = 3 so we try (x+3) 2. However, (x+3) 2 = x 2+ 6x + 9. We thus ...
MS
Answered by Marine S. • Maths tutor
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What is a reflex and what do you mean by a reflex arc? (both "reflex" and "reflex arc" are on the CCEArevised GCSE Biology specification)

1. A reflex is an automatic response to a stimulus . For example: If I touch a hot plate, my hand will automatically pull away from the heat. Another example is the pupillary light reflex. If you turn on a l...
MM
Answered by Michael M. • Biology tutor
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Briefly describe how the autonomic nervous system returns internal body temperature to normal following a rise in body temperature

Body temperature in mammals is controlled and maintained by a small part of the brain called the hypothalamus. Information about the temperature both inside and outside of the body is detected by thermoregul...
CR
Answered by Chantal R. • Biology tutor
3211 Views

Why is the marginal return curve twice as steep as the average revenue curve in microeconomics firm theory?

The average revenue is the demand curve, revenue is calculated by q*p, so (a+q)q = aq-q^2, the marginal revenue is the rate of change in the revenue so if we differentiate wrt q, we get a-2q, which illustrat...
JN
13258 Views

How should I write/approach an unseen poetry comparison essay?

Poetry can be complicated and vague, with many subtle layers of meaning, but when you’re writing an analytical response to it, you want to be clear, concise, and structured in your answers; especially since ...
KD
6666 Views