Answer:
4
Step-by-step explanation:
i. d k I just entered the data into calculator
Answer:
The answer is 1800!
Step-by-step explanation:
Answer:
Step-by-step explanation:
Answer:
x^2 -81
Step-by-step explanation:
(x+9)(x-9)
FOIL
first x*x = x^2
outer -9x
inner 9x
last -9*9 = -81
Add them together
x^2 -9x+9x -81
Combine like terms
x^2 -81