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soccerbabe239 Group Title

factor 4y^2-9

  • one year ago
  • one year ago

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  1. ZeHanz Group Title
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    It is of the form a² - b² = (a + b)(a - b). Here: a² = 4y² and b² = 9. So if you can figure out a and b, you can factor it!

    • one year ago
  2. soccerbabe239 Group Title
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    would it be (4y+3)(4y-3) ?

    • one year ago
  3. whpalmer4 Group Title
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    Close, but not quite. 4*4 = 16.

    • one year ago
  4. whpalmer4 Group Title
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    \[a^2 = 4y^2\]Take square root of both sides \[a=\sqrt{4y^2} = ?\]

    • one year ago
  5. soccerbabe239 Group Title
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    oh haha so it would be (2y+3)(2y-3)

    • one year ago
  6. ZeHanz Group Title
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    Right!

    • one year ago
  7. whpalmer4 Group Title
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    By the way, learning to recognize difference of squares like this is an important trick in your bag of factoring tricks.

    • one year ago
  8. soccerbabe239 Group Title
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    okay! haha blonde moment! :)

    • one year ago
  9. ZeHanz Group Title
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    We all have that once in a while!

    • one year ago
  10. soccerbabe239 Group Title
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    haha this is my 6 th one today :/

    • one year ago
  11. whpalmer4 Group Title
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    And whenever you think you've solved something, or factored it, it's not a bad idea at all to expand it out or plug in the solution and make sure that your answer works!

    • one year ago
  12. ZeHanz Group Title
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    You used them up for the whole week already!

    • one year ago
  13. whpalmer4 Group Title
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    Might have to wear a wig for a few days ;-)

    • one year ago
  14. soccerbabe239 Group Title
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    haha thanks guys! and its natural I cant help it. and the wig wouldnt hide anything. honestly ive tried that and it didn't work:(

    • one year ago
  15. ZeHanz Group Title
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    Just learn to live with it ;)

    • one year ago
  16. soccerbabe239 Group Title
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    haha I do! I just accept im a natural blonde but at least im not a bimbo!

    • one year ago
  17. ZeHanz Group Title
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    Good luck with your maths problems!

    • one year ago
  18. whpalmer4 Group Title
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    I have a friend who is a natural brunette, but she prefers to be blonde, and often pulls it off quite convincingly :-)

    • one year ago
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