salgadodelilah26 salgadodelilah26

13-12-2021
Mathematics

contestada

(3-5i)^2
i know the answer I’m just confused on how to get to that point. Please and thank you!

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loneguy loneguy

13-12-2021

[tex](3-5i)^2\\\\=3^2-2(3)(5i) + (5i)^2\\\\=9-30i +25i^2\\\\=9-30i +25(-1)~~~~;[i^2=-1]\\\\=9-30i-25\\\\=-16-30i[/tex]

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