Standard form for linear equations | Algebra I | Khan Academy

Standard form for linear equations

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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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[amayafranke]

i’ve never had a good math teacher in my life, idk where i would be without this channel

[mediumsizedmammal]

Me remembering I forgot how to do standard form I have a test tomorrow and its 1 am. Thanks

[brycealley]

Sal, thank you for saving my mathematic mind. I never could have done it without this website. I'm now a math person, I enjoy doing math, and I have placed into a higher class in college thanks to 6 or 7 months of studying with this site. Seriously - this website just may have changed my life. #backtoschool

[havenkemmer]

Who else agrees his voice is smooth like butter 😂

[ebton]

casually watching this an hour before an exam :')

[aaronridenour]

4:43
When you try so hard but you can't succeed ;)

[michellestephens]

I sincerely thank you for the service you provide. I am studying for my teaching license and the math portion of the test seemed like a nightmare until I found your instructional videos . This has truly been a lifesaver for me and I feel much more confident in taking my exam. Thank you and thank you!!

[melaomelao]

Is it just me or this guy writes incredibly good with a mouse?

[taraabee]

my son had a 36 in math these videos helped him thanks you so much

[johnnolen]

I learned a way to identify both intercepts by inspection. Consider your line: 9x + 16y = 72. Divide both sides by 72, then (9/72)x + (16/72)y = 1. Rewriting (1/8)x + (2/9)y = 1. In this form the respective intercepts are the reciprocals of the coefficients of each term; i.e. x-int = 8, and y-int = 9/2. ◼

[xxbluejaysxx]

My textbook says standard form is Ax + By + C = 0

[jasonoconnor]

Thank you so much I am in 8th grade taking Algebra 1 and it is difficult this video helped me pass my math test

[hafnimuhammad]

When he speaks about getting the slope what I do is I know that A is the numerator on the slope, and B is the denominator. Then u have to know if the slope is positive or negative. If the equation is written with a plus sign in the middle, the slope is negative, I.e Ax + By. If the equation is written with a negative sign in the middle, I.e, Ax - By, you know it is positive. My maths teacher defaults to Ax - By = A(x coordinate) - B(y coordinate), I think I got that last part right ❤

[lolhumor]

Bro thank u man I have a test tomorrow on all forms and converting them and didn’t understand anything the teacher said so I binge watched your vids and now feel ready to ace it

[Mathmimics]

There is a mistake in the video at minute 2:07, Sal says the coefficients A, B and C must be integers but this is not necessary. You could take for example A=pi

[Can_be_anyone]

Man this video is old but its very nice and it helped a lot at understanding so I can do good at my exam text tomorrow. I really appriciate your work

[isabellamah]

you’re better then any teacher i’ve ever had

[vivrln]

These videos have saved me on so many test thank you

[Anna-bxqc]

this is the 10th video i've watched and it still doesn't make sense and my teacher is horrible at explaining things failing one test won't be that bad right...????

[coffeejellysupremacy]

Not me chillin while watching this(no sleep) 8hrs before deadline lol