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Find the value of X in the equation X^2 + 9X - 22 = 0

There are 3 ways of solving this but I will go through the 2 that are necessary for GCSE level Firstly - 22 can only be made by 1 22 or 2 11 -------> 11 - 2 = 9 therefore 11 and -2 are needed to make the ...
CA
Answered by Christopher A. Maths tutor
4482 Views

How can I make sure I stay focused on the question in the exam?

Writing in exam conditions can be very difficult. We often panic and start writing an answer to the question we think we have seen as opposed to the one we have actually been asked. It is also very easy to g...
IT
4487 Views

Rearrange the equation y = 3(x+1)/4, making x the subject.

Firstly, before we even approach the bracket containing the x term, we want to deal with the fraction. The first step should be multiplying by 4 to cancel out the denominator on the right. This leaves us wit...
MC
Answered by Mustafa C. Maths tutor
3840 Views

What is diffusion?

Diffusion is the net movement of particles from an area of high concentration to an area of low concentration. This means that the particles of a substance move from where there is lots of it to where there ...
RJ
Answered by Rhiannon J. Biology tutor
4378 Views

How do I write an introduction to an English literature essay?

For this answer I will be using the example question "Much American literature is based on the fantasy of the American Dream. Discuss." applied to The Great Gatsby by F. Scott Fitzgerald. The first...
PD
5941 Views