Evaluate
\sqrt{2}\left(-2-2i\right)\approx -2.828427125-2.828427125i
Real Part
-2\sqrt{2}
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\left(-2-2i\right)\sqrt{2}
Combine -2\sqrt{2} and -2i\sqrt{2} to get \left(-2-2i\right)\sqrt{2}.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
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Linear equation
y = 3x + 4
Arithmetic
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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
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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