Answer:
Step-by-step explanation:
Note that the expression is the difference of squares.
36 - 9m² = 6² - (3m)²
6² - (3m)² = (6 + 3m) (6 - 3m)
20 feet high
Do the work
=6-i+4+2i+2-i
=6+4+2+2i-i-i
=12+2i-2i
=12
