Respuesta :

Answer:

15r² - 14x - 8

Step-by-step explanation:

  1. 5x * 3x = 15x²
  2. 5x * -4 = -20x
  3. 2 * 3x = 6x
  4. 2 * -4 = -8

Now add your products,

15x² + -20x + 6x + -8 = 15x² - 14x - 8

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