Factoring a difference of squares

How to factor using the pattern of a “difference of squares”. This video is the 5h out of 16 in the Factoring series. The other three series are “Solving Equations”, “Word Problems” and “Graphing”.

Duration : 0:2:37


[youtube wvFr1BqU4g8]

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34 Responses to Factoring a difference of squares

  1. zerosk8er605 says:

    help me out 18a^2- …
    help me out 18a^2-49b^2

    n^3+5n^2-4n-20

  2. Santamariacastro says:

    Your explanations …
    Your explanations are very clear.
    Thanks for helping students across the globe , succeeding in algebra!
    Great vid.

  3. mathdoris says:

    Directions: Pause …
    Directions: Pause in the beginning and try to factor. Then, when you are done or get stuck, fast forward to 1:20 to the solution. Pause and try the next problem and then fast forward to 2:31 to see the solution and notice the next problem cannot be factored because it is not a difference.

  4. Taylorswiftrocks555 says:

    thanks :)
    thanks :)

  5. rapidfire207 says:

    if the polynomial …
    if the polynomial cannot be factored, arent you suppose to write “prime”?

  6. gemgem92 says:

    you can’t because …
    you can’t because you can’t factorise a, since it’s already factorised from a squared to a

  7. minkusbc says:

    X^2 – 18 could be …
    X^2 – 18 could be factored into (x + square root of 18) ( x – square root of 18), but we usually only look at rational answers, so we are looking for perfect squares, and 18 is not a perfect square. So in this case we would say. “can not be factored”

  8. minkusbc says:

    If you are refering …
    If you are refering to the bracket (a – 4), it can NOT be factored even though the “4″ is a perfect square. The problem is that “a” is NOT a perfect square. Both have to be perfect squares.

  9. icefan11 says:

    I believe the first …
    I believe the first equation can be factored more since 4 is a perfect square.

  10. dmarshall33 says:

    What happens when …
    What happens when you have a number that cant divide equally like 18?

  11. adam12081041993 says:

    cheers, this helped …
    cheers, this helped a lot

  12. minkusbc says:

    I assume you mean …
    I assume you mean 2x^2 + 4. If so, then take out the common factor of 2 like this: 2 (x^2 + 2). After that it can NOT be factored over rational numbers.

  13. ihopeutubedies says:

    how do u factor 2x^ …
    how do u factor 2x^ + 4?

  14. BiscuitODoom says:

    25p^2+81 is simpler …
    25p^2+81 is simpler than (5p+9)^2, therefore is the same level factored because it has the same amount of exponents and plus/minus signs, but if you were taught to do that, I reccomend you please your teacher and do so, however it is the SAME thing.

  15. b4umusic8 says:

    u rock.
    u rock.

  16. casplash4 says:

    you just helped me …
    you just helped me through my homework and on my way to a good grade (a much needed one) thanks again!

  17. casplash4 says:

    THANK YOU SOOO MUCH …
    THANK YOU SOOO MUCH. Subbed

  18. rikku9zashi says:

    I love those pens..
    I love those pens..

  19. cardcutter says:

    YOU ARE GOD!!!!!
    YOU ARE GOD!!!!!

  20. FarichFenand says:

    by the way, you …
    by the way, you sound like Stephen King

  21. FarichFenand says:

    You are amazing, I …
    You are amazing, I love you

  22. wheatingurl says:

    he meant “since”
    he meant “since”

  23. wheatingurl says:

    When you say it …
    When you say it cannot be factored,
    i was taught to do this>>>
    25p^2+81
    *(5p+9)(5p+9)
    *(5p+9)^2

    I only want a reply from the user,
    PLEASE HELP ME, cause im confused and ive got a quiz thursday!!

  24. ChRiSLiHoT says:

    sorry i rated4 …
    sorry i rated4 stars when i meant to rate 5 stars sorry!!!!! but good job!!!!!!! :D

  25. hunter1875 says:

    Great video mate!!! …
    Great video mate!!!!!

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