Question

Simplify
3*3 to the power root 40 - 4* 3 to the power root 320 - 5 to the power root 5?

Answer 1

did you mean

3^3 √40 - 4^3 √320 - 5√5 ????

Answer 2

sounds more like

3*3^√40 - 4*3^√320 - 5^√5

Not much for simplification. I think it's more likely

3*√40 - 4*√320 - 5√5
3*√4√10 - 4*√64√5 - 5√5
12√10 - 32√5 - 5√5
12√10 - 37√5
(12√2-37)√5

But that's just a guess.