We need to remember PEMDAS.
Parenthesis
Exponents
Multiplication and Division
Addition and Subtraction
Let's look at each part of the expression to find the answer.
Parenthesis:
6÷2(1+2)
Let's solve the parenthesis.
1+2=3
The expression now looks like 6÷2×3.
Multiplication and Division:
We do multiplication and division left to right.
6÷2=3
Now multiply by 3.
3×3=9
The answer is 9.