Click here to see more videos: https://alugha.com/FuseSchool Quadratics can be solved in different ways: factorising, quadratic formula, or by completing the square. In this video, we are going to look at how to use the quadratic formula to solve quadratics. Quadratics can’t always be factorised. However, the quadratic formula does always work. Factorising is easier to do, so it’s better to check for that first. But if you can’t factorise, then we can use the quadratic formula instead. If the question says "giving your answer to 3 significant figures", it means these quadratics cannot be factorised, so straight away look to use the quadratic formula. To solve quadratics, they always need to equal 0. So before you start, you may need to do some rearranging into the form, ax2 + bx + c = 0. "a" is the number in front of the x-squared, "b" is the number in front of the "x" and "c" is the number on its own. Make sure you keep the sign in front of the numbers. We then just substitute these a, b, and c values into the quadratic formula. You have to be very careful with negatives. It is best to use brackets. You will nearly always end up with 2 different answers, but occasionally you may get the same answer twice (which can still be correct). 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. Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org 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
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
Click here to see more videos: https://alugha.com/FuseSchool Learn the basics about the principles of green chemistry as a part of the environmental chemistry topic. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. This
