Example: Solving simple quadratic | Quadratic equations | Algebra I | Khan Academy

Simple Quadratic Equation

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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.

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[unicornwizard]

What my teacher explained in two weeks and still got me confused was cleared up in a 2 minute video. Amazing!

[uzairdean]

thank you sooo much my math's teacher is so bad she actually told me to check you out and now you are my teacher basically

[atalover]

OMG Thank you so much. When i was in 8th grade i used to hate watching these but now i appreciate them so much.

[ZedElite]

best thing about Khan: he treats basic addition the same way he will treat the big bang theory explanation! xDD

[Snowdancer]

Thank you so much, this really did help.

[prelounchfoun]

every good comment about you I agree with

[xyrhdks]

wait but how do you know that you have to subtract 3? i mean, why subtract when you can add? i know this sound very dumb but i'm really confused

[rajhiemdanielspublic]

are u sure abt the ± because anything ^2 Is always positive ex -4*-4=+16

[mlpko]

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[TartagliaThe_th_McDsEmployee]

Intructions unclear, my last braincell was deceased during the operation

[cake]

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[xxxYouTunesxxx]

Wish I found this video before ripping my textbook in half out of frustration