Evaluate
60+12i
Real Part
60
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12i\times 1+12\left(-5\right)i^{2}
Multiply 12i times 1-5i.
12i\times 1+12\left(-5\right)\left(-1\right)
By definition, i^{2} is -1.
60+12i
Do the multiplications. Reorder the terms.
Re(12i\times 1+12\left(-5\right)i^{2})
Multiply 12i times 1-5i.
Re(12i\times 1+12\left(-5\right)\left(-1\right))
By definition, i^{2} is -1.
Re(60+12i)
Do the multiplications in 12i\times 1+12\left(-5\right)\left(-1\right). Reorder the terms.
60
The real part of 60+12i is 60.
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