Yes all the water will fit and more because to find a volume of an object you multiple the height x length x width and in this case when all of it is calculated the base could hold 800 cm3 of water
Do you mean LCM (Least common multiple)
Yes you are correct! It doesn't have a solution which means no solution, hope this helps! :D
The -2 has a multiplicity of 2
Since the order of (x+2) is squared, i.e. power is 2
17x +x to the second power