Real Part
\frac{7}{5} = 1\frac{2}{5} = 1.4
Evaluate
\frac{7}{5}-\frac{1}{5}i=1.4-0.2i
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Re(\frac{7}{5}-\frac{1}{5}i)
Divide 7-i by 5 to get \frac{7}{5}-\frac{1}{5}i.
\frac{7}{5}
The real part of \frac{7}{5}-\frac{1}{5}i is \frac{7}{5}.
\frac{7}{5}-\frac{1}{5}i
Divide 7-i by 5 to get \frac{7}{5}-\frac{1}{5}i.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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Matrix
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}