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11-12-2020
Mathematics

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The expression on (3+i)(4+5i) can be written in form a+bi, where a and b are integers. What are the values of a and b? (Show your work please)

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VectorFundament120 VectorFundament120

11-12-2020

[tex](3 + i)(4 + 5i) \\ 12 + 15i + 4i + 5 {i }^{2} \\ 12 + 19i - 5 \\ 7 + 19i[/tex]

Therefore, a is 7 aka real part and b is 19 which is imaginary part.

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