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Factorising and Expanding brackets

How to FACTORISE an equation: To avoid confusion; x = xx = multiplication​Take the example; 3x +18 In order to factorise we need to find a common factor for both '3x' and '18' and this number will be taken o...
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Answered by Josie B. • Maths tutor
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The two blocs of the Cold War

The Cold War (1947/1991) is known as the "ideological" war between the Western Block (lead by the USA) and the Eastern Block (lead by USSR). USA and its allies, the members of NATO (1949) defended ...
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Answered by Claire A. • History tutor
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What is the difference between an animal cell and a plant cell?

It's easy to tell the difference between an animal cell and a plant cell when you look at it,because a plant cell has a rigid wall around it. This keeps the cell in the right shape. An animal cell looks a bi...
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Answered by Elizabeth O. • Biology tutor
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How do I solve the following question. 'Find the values of x such that 2log3(x) - log3(x-2) = 2'.

How do I solve the following question. 'Find the values of x such that 2log 3 (x) - log 3 (x-2) = 2'.To simplify this equation in order to solve it, the first step is to simplify the 2log 3 x term. The log r...
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Answered by Lauren R. • Maths tutor
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What is the role of cilia and mucus in the lungs?

The cilia and sticky mucus work together to protect the lungs from infection, forming what is known as a mucociliary escalator. The mucus traps any bacteria or pathogens as they enter the lungs, and the cili...
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Answered by Corrina H. • Biology tutor
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