6/2(1+2)= 9 or 1 i see 9 why some ppl tell 1

6/2 ( 1 + 2))

Simplify within the parentheses

6/2 (3)

We perform multiplication and division from left to right as we encounter them....so....the first thing we encounter is a division =   6 /2     =   3

So....we have

3 ( 3)  =

9

9 is the answer

1. if we change it like this vertical                                  

The way it si written   6/2  (1+2)  = 9

if it is written     6 / (2 (1+2))  = 1

6 / [ 2 (1 + 2) ]  =

6 / [ 2 * 3 ] =

6 / 6  =

1