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Difference of squares intro | Mathematics II | High School Math | Khan Academy

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When an expression can be viewed as the difference of two perfect squares, i.e. a²-b², then we can factor it as (a+b)(a-b). For example, x²-25 can be factored as (x+5)(x-5). This method is based on the pattern (a+b)(a-b)=a²-b², which can be verified by expanding the parentheses in (a+b)(a-b). Watch the next lesson: https://www.khanacademy.org/math/high-school-math/math2/math2-factorization/math2-diff-of-squares/v/factoring-to-produce-difference-of-squares?utm_source=YT&utm_medium=Desc&utm_campaign=highschoolmath Missed the previous lesson? https://www.khanacademy.org/math/high-school-math/math2/math2-factorization/math2-factor-polynomials/v/factoring-trinomials-by-grouping-1?utm_source=YT&utm_medium=Desc&utm_campaign=highschoolmath High School Math on Khan Academy: Did you realize that the word "algebra" comes from Arabic (just like "algorithm" and "al jazeera" and "Aladdin")? And what is so great about algebra anyway? This tutorial doesn't explore algebra so much as it introduces the history and ideas that underpin it. About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s High School Math channel: https://www.youtube.com/channel/UCAj83VTec-NC-g0BK8zpxzw?guided_help_flow=3?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
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Text Comments (19)
SA alnu3imi (6 days ago)
وابييي م شي عرب هنييي؟ هذا وضع الي ياخذو رياضيات اول مره انجليزي ههههههههه يسولفو مع عمرهم بالكومينت
meme guy (2 days ago)
انا عربي :)
Alejandro Marquez (2 months ago)
What if the variable has a number in front of it for example like 9x^2-1?
Lisa Wang (3 months ago)
Thank you I probably owe you my future 😂
Simone Wright (5 months ago)
Thank you! So helpful and pretty direct
Booga04 Minecraft (5 months ago)
SO HELPFUL! I was able to finish my Quiz because of you. Thank you so much! :3
iSpyhinx (6 months ago)
But what if the number x squared is being added to not a square for example: X2+10 = N
Fe Dionsay (6 months ago)
Your videos are better than my teacher
Eduardo Sadayan Marcaida (7 months ago)
Khan Academy You are as good as a Teacher, I even guess you're better than one! Juat single watch of your vid made me realise I can pass the test, even though I was bad at learning at first. Thank you so much
Ed Shokur (1 year ago)
Don't watch this video because you just might learn something.
Bobington1 (1 year ago)
don't watch this video it is too advanced
Emily Hannold (1 year ago)
Great video, and how ironic that im learning this in class and have a test soon. It's easier of you just do the square root of the number.
Joseph _ (1 year ago)
can you do a video on Elliott wave theory
fatima idriiz (1 year ago)
thanks
Militant Pacifist (1 year ago)
You can also factor x-3.
LeventeHargitai (1 year ago)
Well, this is cool. Im here early lol
Rasmus Nielsen (1 year ago)
On a Friday night? Haha
Ahmad AlSayed (1 year ago)
Very nice
Meme Queen (1 year ago)
first

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