Evaluate
11-i
Real Part
11
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11+\left(-9+8\right)i
Combine the real and imaginary parts.
11-i
Add -9 to 8.
Re(11+\left(-9+8\right)i)
Combine the real and imaginary parts in -9i+11+8i.
Re(11-i)
Add -9 to 8.
11
The real part of 11-i is 11.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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