(ab+3)(ab−3)
=(ab+3)(ab+−3)
=(ab)(ab)+(ab)(−3)+(3)(ab)+(3)(−3)
=a^2b^2−3ab+3ab−9
=a^2b^2−9
What is the height of the cylinder??
A (it’s a slight increase)
if you have a TI-84 calculator you could solve this problem in seconds.
I think the answer is 2 13/20
Or, in decimals: 1.3
