6 / 2 (1+2) = ......

what is the answer and why?

the formula is BEDMAS bracket, exponent, division, multiplication, addition, subtraction

that is the order to solve the equation...

NOTE: you may use multiplication before division if it appears first aswell as subtraction

6/2x(1+2)
= 6/2 x 3
= 3 x 3
=9

You first have distribute the parentheses

Say for example X(Y+Z)=XY+XZ

So
2 ( 1 + 2 )= 2*1+2*2 = 2+4=6
6/6=1

6 / 2 ( 1 + 2 )
6 / [ ( 2 * 1 ) + ( 2 * 2 ) ]
6 / 6 = 1

Why there is such a debate on this question is ambiguities of what you are actually trying to do depending on the content either could be right

That depends on whether you mean 6 / (2 * (1+2)) or (6/2 ) * (1+2).

But if we're doing it by BEDMAS, and I'd say the answer is:

6/2 (1+2)
= 3 (1+2)
= 3 (3)
= 9

6 / 2(1 + 2) =
6 / 2(3) =
6 / 6 =
1.