Step 1 :Distribute the 4 in the second term to both the real and imaginary parts: \(4(1-2 i) = 4 - 8i\).
Step 2 :Subtract the real part of the second term from the real part of the first term: \(-10 - 4 = -14\).
Step 3 :Subtract the imaginary part of the second term from the imaginary part of the first term: \(9i - (-8i) = 17i\).
Step 4 :The result of the subtraction is \(-14+17i\), which is in the standard form for a complex number.
Step 5 :Final Answer: \(\boxed{-14+17 i}\)