- #1

paulb203

- 64

- 24

- TL;DR Summary
- Why are the division rules regards surds the way they are?

Why does, 4√64÷2√4

=2√16 ?

I can see the method (4÷2=2, √64÷√4=√16)

But why is it not;

4 times √64 divided by 2 times √4 (as per BODMAS)

i.e, 4 times 8 divided by 2 times 2, which = 32

Nb. When I put it into my calculator that way it gives 32 as the answer

(4*√64÷2√4)

=2√16 ?

I can see the method (4÷2=2, √64÷√4=√16)

But why is it not;

4 times √64 divided by 2 times √4 (as per BODMAS)

i.e, 4 times 8 divided by 2 times 2, which = 32

Nb. When I put it into my calculator that way it gives 32 as the answer

(4*√64÷2√4)