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If a and b are the roots of the quadric polynomial 2x^2+6x+7 what are a+b and ab?

The phrase "a and b are roots of 2x^2+6x+7" is just a way of saying that x=a and x=b solve the equation 2x^2+6x+7=0. Check out that by diving by 2 on both sides of this equation we get that that x=...
GC
Answered by Guillermo C. • Maths tutor
3772 Views

How do you analyse a primary source?

The key to analysing a primary source is remembering what it is; it's a source from which we want to get useful historical evidence. But, if it is a primary source, then we must remember that it is completel...
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Answered by Ben F. • History tutor
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How is air breathed in to the lungs so that oxygen reaches the gas exchange surfaces?

The diaphragm contacts and moves down. The intercostal muscles between the ribs contract. This causes the ribcage and the sternum to move up and out. The thorax increases in width from back to front. This re...
MS
Answered by Medi S. • Biology tutor
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Assess the strengths and weaknesses on the functionalist approach to society (33 marks)

A strength of the functionalist approach to society is the explanation of how social order is achieved.Parsons argues that social order is achieved through the existence of a shared culture, a set or norms a...
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Answered by Aimee G. • Sociology tutor
42455 Views

How do I write a conclusion?

Firstly, make sure to never add a new point in the conclusion! A conclusion should be a neat summary of your argument, with a punchy line at the end if possible. Reference your introduction as you write your...
AC
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