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B How do I "step by step" (nx)^2?

  1. Mar 6, 2016 #1
    for example 3x^2 + (3x)^2 is 12x^2

    But i don't remember how to brake down (3x)^2 step by step
     
  2. jcsd
  3. Mar 6, 2016 #2

    RUber

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    You can distribute exponents across multiplication. ##(AB)^2=A^2B^2. ##
     
  4. Mar 6, 2016 #3

    Mark44

    Staff: Mentor

    ##(3x)^2## means two factors of 3x; i.e., 3x times 3x.
     
  5. Mar 6, 2016 #4

    Math_QED

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    (AB)² = (AB)*(AB) = ABAB = AABB = A²B²
     
  6. Mar 6, 2016 #5
    Oh my, I had a gut feeling it would be something this simple that I've forgot! haha thanks alot!! ^^
     
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