Evaluate
-21-9i
Real Part
-21
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-11-10+\left(-10-\left(-1\right)\right)i
Subtract 10-i from -11-10i by subtracting corresponding real and imaginary parts.
-21-9i
Subtract 10 from -11. Subtract -1 from -10.
Re(-11-10+\left(-10-\left(-1\right)\right)i)
Subtract 10-i from -11-10i by subtracting corresponding real and imaginary parts.
Re(-21-9i)
Subtract 10 from -11. Subtract -1 from -10.
-21
The real part of -21-9i is -21.
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Limits
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