Example 1: Using the quadratic formula | Quadratic equations | Algebra I | Khan Academy

Quadratic Formula 1

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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.

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[zeddash.]

Wow. This is one of the best videos ever. It explains the way we want to learn.

[toyuts]

Your pace, is so much better than my teacher at school thank you ver much

[TheYoungMariah]

Dude this lesson would have been drug on for and hour in my class. And I still wouldn't have understood it this well.

[anisaalija]

I watched this video right now and it was very useful for me.And I asked myself were I was all this time that I didnt watch your videos.Maybe my maths would be better.Anyway I will keep watching your videos.Thank you so much Khan.Wish you all the best!

[PicosABeast]

Thankss wow it wasn't really ever that hard

[AnujFalcon]

I have seen lot of your videos and failed to leave a comment
You are great!
Continue your job!All the best

[gabysavii]

omg your letter/numbers is so wonderful!! i want it!!!

[evolvedgeek]

i hope this helps in college algebra and i am not good at math but i have heard nothing but good things

[KingJamison]

this helped me so much cuz i was out for like a week

[shankyxyz]

very nice video. i think it would be great if u draw a curve or the function so ppl understand what the 2 solutions mean and all its degeneracies.

[Jaspering]

My math teacher made us memorize a song to remember the quadratic formula

[yuhali]

for the first time I actually understand nothing in algebra ;D

[ellacatherinereitz]

my algebra one final is tommorw. wish me luck

[-zerenity-]

Which one is more effective PQ formula or ABC formula

[XCRunnerS]

how do i know what side to move things to, i always pick the wrong side :(

[lukekab]

Ohhhh.... so this is how you find the roots. :D

[tgmoren]

@Ryayayan1 what about your English teacher?

[nickramella]

Go to captions, translate and scroll down to portuguese.

[karengibson]

how to find the quadratic formula for x^2+6x-10=0 and fully simplify