Algebraic fractions are simply fractions with algebraic expressions either on the top, bottom or both. We treat them in the same way as we would numerical fractions. In part 1 we saw how to simplify, and add and subtract algebraic fractions. We discovered that algebraic fractions follow the same principles as numeric fractions. In this video we’re going to look at how to solve problems involving algebraic fractions. When solving, we could treat them as fractions and make the same denominator to add or subtract. But it’s much easier to cross multiply to get rid of the denominators completely, so this is the method we use in this video. Multiply up one denominator at a time, making sure you multiply every numerator. Do not miss any term out. Multiply EVERYTHING in the question. Quite often when solving algebraic fractions, we end up with quadratics which we need to factorise. This then means we might end up with two different values of x. As always in maths, it’s really good practice to go back and check your answers, but substituting them in.
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Learn the basics about Testing for positive ions - part 2. Find out more in this video!
This video is part of 'Chemistry for All' - a Chemistry Education project by our Charity Fuse Foundation - the organisation behind The Fuse School. These videos can be used in a flipped classroom model or as a

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CREDITS
Animation & Design: Waldi Apollis
Narration: Lucy Billings
Script: Lucy Billings
Trigonometry in 3D can look really scary… but if we split it down into 2D problems, then there’s nothing new to learn. Always look for right angle

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Parallel lines are always the same distance apart and never meet.
We use arrowheads are used to show that lines are parallel.
See how these lines have one arrow. Then, because these ones are also parallel, but not parallel to the ones be