To solve the given expression by distributing the "-" sign outside the parentheses, follow these steps:
Given Expression:
[tex]\[ -(-9.9 I n - 3) \][/tex]
Step 1: Distribute the negative sign inside the parentheses. When you distribute a negative sign across a subtraction inside the parentheses, each term inside the parentheses changes its sign:
[tex]\[ = -(-9.9 I n) - (-3) \][/tex]
Step 2: Apply the changes to each term:
- For [tex]\(-(-9.9 I n)\)[/tex], the double negative turns into a positive:
[tex]\[ -(-9.9 I n) = 9.9 I n \][/tex]
- For [tex]\(-(-3)\)[/tex], the double negative also turns into a positive:
[tex]\[ -(-3) = 3 \][/tex]
Step 3: Combine the results:
[tex]\[ = 9.9 I n + 3 \][/tex]
So, the final equivalent expression is:
[tex]\[ 9.9 I n + 3 \][/tex]
Therefore, the answer is:
[tex]\[ \boxed{9.9 I n + 3} \][/tex]
