Let's simplify the given expression step by step.

The expression is:

$-\sqrt{36} - \sqrt{-9} - \sqrt{1} - \sqrt{-64}$

Step 1: Simplify each square root term.

1. $\sqrt{36} = 6$, so $-\sqrt{36} = -6$.
2. $\sqrt{-9}$ involves the square root of a negative number, which can be written as $\sqrt{-9} = \sqrt{9} \times \sqrt{-1} = 3i$, so $-\sqrt{-9} = -3i$.
3. $\sqrt{1} = 1$, so $-\sqrt{1} = -1$.
4. $\sqrt{-64}$ can be written as $\sqrt{64} \times \sqrt{-1} = 8i$, so $-\sqrt{-64} = -8i$.

Step 2: Combine the simplified terms.

Now, the expression becomes:

$-6 - 3i - 1 - 8i$

Step 3: Group the real and imaginary terms.

Combine the real parts and the imaginary parts:

$(-6 - 1) + (-3i - 8i) = -7 - 11i$

Final Answer:

The expression simplified to $a + bi$ form is:

$\boxed{-7 - 11i}$

Would you like details on any step or have any further questions? Here are some related questions:

1. How do you simplify complex numbers involving square roots of negative numbers?
2. What is the significance of the imaginary unit $i$ in mathematics?
3. How do you add or subtract complex numbers?
4. What are some real-life applications of complex numbers?
5. How do you multiply and divide complex numbers?

Tip: Always remember that the square root of a negative number introduces the imaginary unit $i$, where $i = \sqrt{-1}$.