Respuesta :

mhanifa

Answer:

  • 1) A, 2) C, 3) C

Step-by-step explanation:

Q1.

  • Trinomial has three terms
  • 2x² + 3x - 4

Q2.

The trinomial is incorrect. It should be x² - 8x - 20.

Then the factors are:

  • C. (x - 10)(x + 2)

Q3.

Sets

  • A = {1, 8, 9, 11, 15} and B = {2, 6, 8, 11, 20}

Union is the addition of the the elements into one set:

  • AUB = {1, 2, 6, 8, 9, 11, 15, 20}