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Factorise fully 2x^2 -x -4=2 and thus solve for x

Recall that to solve a quadratic it needs to be in the form ax 2 + bx +c = 0, Subtract 2 from each side to get 2x 2 -x-6=0 therefore a=2 b=-1 and c=-6 Solve by considering factors c and a that expand out to ...
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Answered by Lucy S. • Maths tutor
3321 Views

Describe the structure and properties of graphite

Graphite is made from layers of carbon which contain many 6-membered carbon rings (hexagonal). Each layer is held together by each carbon being covalently bonded to 3 other carbon atoms and this leaves a del...
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Answered by Lucy S. • Chemistry tutor
7504 Views

What is the time complexity of Bubble Sort?

had problems before interview with submitting this and have therefore no longer got my answer, however was able to complete the interview successfully with the answer
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Answered by Ben I. • Computing tutor
1953 Views

How do you know whether a noun is masculine or feminine in French?

This is a common question from all French students with no straightforward answer. This question can only fully be answered through experience and memorisation of the French nouns with their gender. However,...
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Answered by Natasha G. • French tutor
4667 Views

Define first ionisation energy

Remember that ionisation energy is an endothermic process, in which energy from the chemical system is used to remove electrons from atoms in the GASEOUS STATE.
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Answered by Obioma C. • Chemistry tutor
2892 Views