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Homework Help: Maths question on making the subject

  1. Apr 25, 2009 #1

    A = 1/2 B (C - D) ^2

    And I wanted to make B the subject

    I have done:

    2 x B = (C - D) ^ 2 / A

    B = ( (C - D ^ 2) / A) / 2

    Is this correct or not? And if not could you please amend it to make B the subject?

    These are not the actual variables in the question by the way.

    Also, how would I make D the subject in:

    A = 1/2 B (C - D) ^2

    Any help is appreciated. Thanks.
  2. jcsd
  3. Apr 25, 2009 #2
    And one last question,
    How would I make

    C the subject in:

    A = B / ( C x D x E) x gradient?
  4. Apr 25, 2009 #3


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    Science Advisor
    Homework Helper

    Hi questions_uk! :smile:

    (try using the X2 tag just above the Reply box :wink:)
    Do you mean A = B(C - D)2/2,

    or A = (C - D)2/2B ? :confused:
  5. Apr 26, 2009 #4

    From A = 1/2 B (C-D)2

    And making B the subject.
  6. Apr 26, 2009 #5


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    Science Advisor

    When someone asks for clarification, do NOT just repeat the original post!

    Please answer the question! Is that
    A= 1/(2B(C-D)^2) or A= (1/2)B(C-D)^2 ?
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