Linear Algebra on Khan Academy: Have you ever wondered what the difference is between speed and velocity? Ever try to visualize in four dimensions or six or seven? Linear algebra describes things in two dimensions, but many of the concepts can be extended into three, four or more. Linear algebra implies two dimensional reasoning, however, the concepts covered in linear algebra provide the basis for multi-dimensional representations of mathematical reasoning. Matrices, vectors, vector spaces, transformations, eigenvectors/values all help us to visualize and understand multi dimensional concepts. This is an advanced course normally taken by science or engineering majors after taking at least two semesters of calculus (although calculus really isn’t a prereq) so don’t confuse this with regular high school algebra.

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Learn how to solve a quadratic equation by factoring when a is not 1. To factor an algebraic expression means to break it up into factors (expressions that can be multiplied together to get the original expression). To factor a quadratic trinomial where the coefficient of the squared variable is not 1, we find two…

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In this video (and other videos in this playlist) you will learn and practice different possible examples in simplifying square roots (radicals) and also learn how to add or subtract, multiply and divide the expressions that have square roots or radicals. Leave me a comment if you did not learn any part of it. Please…