In this video we are going to look at how to change the subject of a formula, when the subject appears twice. We have already looked at how to change the subject in another video, so you may want to watch that first. We always use opposites: adding and subtracting, multiplying and dividing, squaring and square rooting. To keep equations balanced, you must do everything to BOTH sides and then cancel on the one side. Take the rearranging step by step, starting with the things that are ‘least’ connected to your chosen subject. When the subject appears twice in the formula, we need to factorise. E.g. Make x the subject of A = 2xy + xz. Factorise the right hand side to get A = x(2y + z) and then divide both sides by the bracket (2 + z), giving A / (2y + z) = x. Another example: make m the subject of F = (mv - mu) / t. Again, because 'm' appears twice we know we’ll probably need to factorise at some point. Start by moving the ‘t’ as that’s least connect to the m’s, so multiply both sides by 't'. Ft = mv - mu. Now factorise the right hand side. Ft = m(v - u). Finish off by dividing both sides by the bracket (v - u), giving the final answer Ft / (v - u) = m. VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you. These videos can be used in a flipped classroom model or as a revision aid. Click here to see more videos: https://alugha.com/FuseSchool Twitter: https://twitter.com/fuseSchool Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org Friend us: http://www.facebook.com/fuseschool This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC ( View License Deed: http://creativecommons.org/licenses/by-nc/4.0/ ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: info@fuseschool.org
Learn about graphs. In this introductory video we will introduce coordinates, quadrants and the two axis: x-axis and y-axis. Click here to see more videos: https://alugha.com/FuseSchool VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders
Let’s discover some more circle theorems so that we can solve all types of geometrical puzzles. We discovered these 4 theorems in part 1: Angle at the centre is double the angle at the circumference The angle in a semi-circle is 90 degrees Angles in the same segment are equal / Angles subtended by
Click here to see more videos: https://alugha.com/FuseSchool If we don't have the vertical height of a triangle, then we can find the area of the triangle using 1/2absinC. In this video we are going to discover where this formula comes from. The formula is based on area = 1/2 base X height and a
