Final answer:
The expression √(-9) + √(-4) - √(16) as a complex number in standard form is 5i - 4.
Step-by-step explanation:
The expression √(-9) + √(-4) - √(16) can be simplified as follows:
√(-9) + √(-4) - √(16) = √(9 × (-1)) + √(4 × (-1)) - √(16) = 3i + 2i - 4 = 5i - 4
Therefore, the expression √(-9) + √(-4) - √(16) as a complex number in standard form is 5i - 4.