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How do I solve x^2+6x+8=0?

Ok, so we would call this a quadratic equation because it is written in the form of ax^2+bx+c=0 (in our case, a=1, b=6, c=8).Luckily, this type of quadratic equation can be factorised, so we can solve it ...

WS
Answered by William S. Maths tutor
15993 Views

What is Price Elasticity of Demand?

Price Elasticity of Demand refers to an economic measure which evaluates the change in price of a good against its respective change in demand.

In simple terms:

If the price of a good rises ...

KC
2443 Views

Describe two different test tube reactions to identify the following organic compounds: propanal and benzoic acid.

There are several different answers one could make and an exam question would just require one for each. 

1) Propanal - from the ending "al" this is an aldehyde.

 ...

DD
Answered by Daniel D. Chemistry tutor
14179 Views

Solve the simultaneous equations y = 2x-3 and x^2 +y^2 = 2

Let the first equation be equation 1 and the second equation be equation 2.

Firstly, you must substitute equation 1 into equation 2. This is because there are currently two unknown values...

DD
Answered by Daniel D. Maths tutor
29374 Views

How does blood return from the feet back to the heart?

First, some general advice:It is not uncommon for medical interviews, particularly at Oxbridge, to test the interviewee's ability to think laterally, creatively or "outside of...

AV
16001 Views

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