Evaluate
6+3i
Real Part
6
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2\left(3+\frac{1}{2}i+i\right)
Divide 12+2i by 4 to get 3+\frac{1}{2}i.
2\left(3+\left(\frac{1}{2}+1\right)i\right)
Combine the real and imaginary parts in numbers 3+\frac{1}{2}i and i.
2\left(3+\frac{3}{2}i\right)
Add \frac{1}{2} to 1.
2\times 3+2\times \left(\frac{3}{2}i\right)
Multiply 2 times 3+\frac{3}{2}i.
6+3i
Do the multiplications.
Re(2\left(3+\frac{1}{2}i+i\right))
Divide 12+2i by 4 to get 3+\frac{1}{2}i.
Re(2\left(3+\left(\frac{1}{2}+1\right)i\right))
Combine the real and imaginary parts in numbers 3+\frac{1}{2}i and i.
Re(2\left(3+\frac{3}{2}i\right))
Add \frac{1}{2} to 1.
Re(2\times 3+2\times \left(\frac{3}{2}i\right))
Multiply 2 times 3+\frac{3}{2}i.
Re(6+3i)
Do the multiplications in 2\times 3+2\times \left(\frac{3}{2}i\right).
6
The real part of 6+3i is 6.
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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}