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Proof that rational times irrational is irrational | Algebra I | Khan Academy
By Khan Academy
Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It's also seen as a "gatekeeper" subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it's impossible to move forward. It's used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we'll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
01 - Solving Equations in Quadratic Form - Part 1 (Learn to Solve Equations in Algebra)
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
01 - Visualize Roots of Equations - Linear, Quadratic, Cubic, Quartic Solutions
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
12 - Solving 3-Variable Linear Systems of Equations - Substitution Method
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
10 - What are Imaginary Numbers?
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
06 - Equations & Definition of Conic Sections - Circle, Ellipse, Parabola & Hyperbola
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
03 - Inverse Variation & Joint Variation - Part 1 (Hyperbolas & Inverse Square Law)
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
01 - Shifting Ellipses and Hyperbolas in the XY Plane - Part 1 (Central Conics)
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!