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Liberty University
Adding Subtracting And Multiplying Complex Numbers - Example 3

Algebra 2

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Quadratic Functions

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It's a complex numbers got three plus four I times three minus four I. So we're gonna use our full methods to do so. Remember that. Full its first outside inside last. So we're gonna multiply three times three for our first numbers. Outside would be three times negative. Four I inside would be four I times three and last. That's gonna be four I Tom's negative four I. So let's simplify those some. So that would be three times three is none negative. 12 i 12 I and negative 16 squared, which we know that I squared is the same as negative one. So we're gonna rewrite That is negative 16 times negative one which is positive 16. So let's combine like terms So I have nine minus 12 I plus 12 I plus 16. So non plus 16 is 25 and negative 12 I plus 12 I is zero. I will zero eyes the Samos multiplying zero times square A negative one which we know zero times any number is still zero. So my solution is 25