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Is this algebraic expression correct

  1. Jul 30, 2009 #1
    a(a-6) + 9 = 0
    a2 - 6a + 9 = 0
    (a - 3)(a - 3) = 0
    a = -3

    is this correct
     
  2. jcsd
  3. Jul 30, 2009 #2

    berkeman

    User Avatar

    Staff: Mentor

    All except for the last step. If a - 3 = 0, then a = ____
     
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