Evaluate
48+40i
Real Part
48
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8i\times 5+8\left(-6\right)i^{2}
Multiply 8i times 5-6i.
8i\times 5+8\left(-6\right)\left(-1\right)
By definition, i^{2} is -1.
48+40i
Do the multiplications. Reorder the terms.
Re(8i\times 5+8\left(-6\right)i^{2})
Multiply 8i times 5-6i.
Re(8i\times 5+8\left(-6\right)\left(-1\right))
By definition, i^{2} is -1.
Re(48+40i)
Do the multiplications in 8i\times 5+8\left(-6\right)\left(-1\right). Reorder the terms.
48
The real part of 48+40i is 48.
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