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How do we expand (3y-2)^2?

(3y-2)^2=(3y-2)(3y-2)You're basically multiplying 3y-2 by itself.Let's start with the 3x in the first bracket.3y x 3y + 3y x (-2)=9y^2-6yNow let's move on to the -2 in the first bracket.-2 x 3y + (-2) x (-2)...
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Answered by Sum-Ping L. • Maths tutor
5266 Views

How do I structure my essays?

You could either structure them chronologically for example when discussing a piece of poetry or a short story you could take the beginning, middle and end of the text and analyse these sections in depth, fo...
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Translate the following sentence into German: My brothes reads books in his bedroom.

Mein Bruder liest Bücher in seinem Schlafzimmer.
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Answered by Aleksandra L. • German tutor
2016 Views

Give examples of some factors that increase the rate of diffusion.

Temperature: An increase in temperature increases diffusion rate. Concentration gradient (difference in concentration): A greater concentration gradient increases diffusion rate. Surface area of a membrane: ...
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Answered by Miya A. • Biology tutor
25040 Views

Using a reaction as an example, explain why bromine is more reactive than iodine in terms of electrons.

bromine + sodium iodide --> sodium bromide + iodineBr 2 + 2NaI --> 2NaBr + I 2 Both bromine and iodine atoms have 7 electrons in their outer shells, a full shell contains 8 electrons. Bromine has 4 she...
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Answered by Vasudha S. • Chemistry tutor
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