Express the following in the form `a+i b :(5i)(-3/5i)`

Explanation

To express the complex number \( (5i)(-\frac{3}{5i}) \) in the form \( a + ib \), we will follow these steps:

### Step 1: Write the expression
We start with the expression:
\[ (5i)\left(-\frac{3}{5i}\right) \]

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