Re-write the original equation:  v = u + at, except now with the numbers they've given for each letter:

v = 3 + (-2 * 1/4)  ---> [Remember in algebra, two letter next to each other have a multiply in between them!]

Now we simplify using BIDMAS:

v = 3 + (-1/2)

v = 3 - 1/2

v = 2 1/2 or 2.5

:)

Maths

V=u+at u=3 a=-2 t= 1/4

Initially, your equation will include dy/dx = (...) right? Inside the (...) will be an "x" term and a "y" term. For example: dy/dx = x/(1 + y). 

Rearrange that so your "y" term is with dy and your "x" term is with dx:

(1+y) dy = x dx

Integrate each side!

y + (y^2/2) = x^2/2 + c --->   [the (+ c) only needs to be on one side, I prefer the left.]

What you do from here depends on your question so I'm going to leave it there. Hope that helps! If you need any more help feel free to message me :)

How do I do differential equations?

Try different techniques! 

I revised best by answering questions and learning from the mistakes I made. Which I would definitely suggest for all subjects, especially for those that are very application driven (Maths and Sciences). For things that require more memory and recall, see what works for you. Mind maps, flash cards, summarised notes, flow charts; all good ways to help you retain information. Then try answering a question and see how well you were able to recall what you learnt. It’s just a matter of trying different ways and seeing what you respond best to :)

Study Skills

How do I know what is the best way to revise for me?

This series covers Differentiation, aimed at Year 12 students studying Maths. Particularly those doing the Edexcel exam board. However, others can definitely benefit!

A-Level

Differentiation Made Easy - Part 1

In this series of videos, I go through the main concepts of Physical Chemistry at A-Level. These videos have been made to include topics across all exam boards, so it's best to use this as a supplement to your specification!

Chemistry

A-Level Physical Chemistry

This series of videos will cover Pure Maths 1 for students in their first year of A-Levels. I've made this series using the Edexcel exam board, but it may still be helpful to those studying from other exam boards.

Ibrahim Dangra

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Queen Mary University of London

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Ibrahim Dangra