Evaluate
30+12i
Real Part
30
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-6i\left(-2\right)-6\times 5i^{2}
Multiply -6i times -2+5i.
-6i\left(-2\right)-6\times 5\left(-1\right)
By definition, i^{2} is -1.
30+12i
Do the multiplications. Reorder the terms.
Re(-6i\left(-2\right)-6\times 5i^{2})
Multiply -6i times -2+5i.
Re(-6i\left(-2\right)-6\times 5\left(-1\right))
By definition, i^{2} is -1.
Re(30+12i)
Do the multiplications in -6i\left(-2\right)-6\times 5\left(-1\right). Reorder the terms.
30
The real part of 30+12i is 30.
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