Final answer:
The expression '2n+4-(n-2)' simplifies to 'n+6' by distributing the negative sign inside the parentheses and combining like terms.
Step-by-step explanation:
To simplify the expression 2n+4-(n-2), we first need to distribute the negative sign to the terms inside the parenthesis. This changes the expression into 2n + 4 - n + 2. Next, we combine like terms by adding or subtracting n terms and constant terms separately. Therefore, 2n minus n is equal to n, and 4 plus 2 is equal to 6. The simplified expression is n + 6.