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Which of the expressions below could be factored quickly using the "difference of squares"? Select all that apply.
O 81x² - 12
O x^2 + 25
O 4x^2 – 25
O 9x^2 – 16
O x^2-50
O x^2-81
O x^2-100

Respuesta :

mhanifa

Answer:

  • 81x² - 12, no as 12 is not a perfect square
  • x^2 + 25, no as it is a sum of squares
  • 4x^2 - 25, yes
  • 9x^2 - 16, yes
  • x^2 - 50, no as 50 is not a perfect square
  • x^2 - 81, yes
  • x^2 - 100, yes

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