Evaluate 2i−18i . Provide your answer in the form of a+bi .

Answer 1

To evaluate the expression \( 2i - 18i \), we can combine the imaginary parts:

\[ 2i - 18i = (2 - 18)i = -16i \]

In the form of \( a + bi \), where \( a \) is the real part and \( b \) is the imaginary part, we can identify:

\[ a = 0 \quad \text{and} \quad b = -16 \]

Thus, the answer in the form \( a + bi \) is:

\[ 0 - 16i \quad \text{or simply} \quad -16i \]