Evaluate
-18+12i
Real Part
-18
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3i\times 4+3\times 6i^{2}
Multiply 3i times 4+6i.
3i\times 4+3\times 6\left(-1\right)
By definition, i^{2} is -1.
-18+12i
Do the multiplications. Reorder the terms.
Re(3i\times 4+3\times 6i^{2})
Multiply 3i times 4+6i.
Re(3i\times 4+3\times 6\left(-1\right))
By definition, i^{2} is -1.
Re(-18+12i)
Do the multiplications in 3i\times 4+3\times 6\left(-1\right). Reorder the terms.
-18
The real part of -18+12i is -18.
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