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describe and correct error

 
how do I describe and correct this error:
 
   (3x - 2) (2x - 3)
 
  =3x(2x-3) - 2(2x - 3)
  =6x^2-9x-4x-6
  =6x^2-13x-6
 
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2 Answers

(3x-2)(2x-3) = 6x^2-9x-4x+6 = 6x^2-13x+6
 
Your error is in multiplying -2*-3 = +6 not -6.
 The second line:
 
    - 2 ( 2X - 6 ) = -4X +6