Question

1) what is the simplest form of the expression sqrt 20 + sqrt 45- sqrt 5

Answer 1

4 sqrt 5 is the answer

Answer 2

square root of 20 + square root pf 45 - square root of 5. Well if that is so, how to get a square root which is the little 2 is just multiplying the number by its self so 20x20=400 and 45x45= 2,025 and 5x5=25 so 400+2,025-25=2,400