Question

...i don't get it, please help

Answer 1

• 1) A, 2) C, 3) C

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}