Respuesta :

sqdancefan

Answer:

  x² -25

Step-by-step explanation:

(x +5)(x -5) = x(x -5) +5(x -5) = x² -5x +5x -25 . . . . . 5x terms cancel

= x² -25

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This is an example of the factoring of the difference of squares:

  (a+b)(a-b) = a²-b²