math

by simplifying,show that
(2x-3)(2x+3)-(x-4)^2= 3x^2+8x-25

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asked by xavier
  1. (2x-3)(2x+3)-(x-4)^2
    = 4x^2 -9 -x^2 +8x -16
    = 3x^2 +8x -25

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    posted by drwls

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