Answer:

1) x² - 4

2) x² - 1

3) x² - 9

4) x² + x - 30

5) x² - 25

Step-by-step explanation:

Use the FOIL Method.

Multiply the FIRST terms with each other:

(x - 2) (x + 2) = x²

Multiply the OUTSIDE terms with each other:

(x - 2) (x + 2) = 2x

Multiple the INSIDE terms with each other:

(x - 2) (x + 2) = -2x

Multiply the LAST terms with each other:

(x - 2) (x + 2) = -4

SIMPLIFY:

x² + 2x - 2x - 4

x² - 4