Evaluate
-10+13i
Real Part
-10
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10+\left(9-\left(-4\right)\right)i
Subtract 10-4i from 9i by subtracting corresponding real and imaginary parts.
-10+13i
Subtract -4 from 9.
Re(10+\left(9-\left(-4\right)\right)i)
Subtract 10-4i from 9i by subtracting corresponding real and imaginary parts.
Re(-10+13i)
Subtract -4 from 9.
-10
The real part of -10+13i is -10.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
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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