The problem asks to evaluate the expression $(-5 + \sqrt{-4}) + (3 - \sqrt{-16})$.

AlgebraComplex NumbersImaginary NumbersArithmetic Operations
2025/3/7

1. Problem Description

The problem asks to evaluate the expression (5+4)+(316)(-5 + \sqrt{-4}) + (3 - \sqrt{-16}).

2. Solution Steps

First, we simplify the square roots of negative numbers.
4=41=2i\sqrt{-4} = \sqrt{4} \cdot \sqrt{-1} = 2i
16=161=4i\sqrt{-16} = \sqrt{16} \cdot \sqrt{-1} = 4i
Now, substitute these values back into the original expression:
(5+2i)+(34i)(-5 + 2i) + (3 - 4i)
Next, we combine the real and imaginary parts separately:
(5+3)+(2i4i)(-5 + 3) + (2i - 4i)
22i-2 - 2i

3. Final Answer

22i-2 - 2i